OPINION AND ORDER

JED S. RAKOFF, District Judge.

On November 26, 2008 plaintiff Gamze Zivali filed a Class & Collective Action Complaint ("Complaint") on behalf of herself and all others similarly situated. The Complaint alleges that defendant AT & T Mobility LLC ("Mobility" or "AT & T") failed to pay wages and overtime compensation in violation of the Fair Labor Standards Act ("FLSA"), 29 U.S.C. § 201 et seq., and the New York Labor Law. Plaintiff subsequently filed a motion for conditional class certification, which the Court granted on July 14, 2009. See Zivali v. AT & T Mobility LLC, 646 F.Supp.2d 658 (S.D.N.Y.2009). Following conditional certification, over 4,100 plaintiffs opted in to the action. Plaintiffs' Memorandum of Law in Opposition to Defendant's Motion to Decertify ("Pls.' Opp'n to Decertification") at 2. The parties engaged in extensive discovery, including deposition discovery of 29 randomly selected opt-in plaintiffs. Id. On the basis of a voluminous evidentiary record, Mobility moved to decertify the collective action on November 8, 2010, and for summary judgment on November 16, 2010. The parties submitted opposition and reply papers to each motion, and the Court held oral argument on January 24, 2011.

After careful consideration, the Court hereby grants Mobility's motion to decertify the collective action. Overall, the Court concludes that plaintiffs have failed to demonstrate they are similarly situated for the purposes of a FLSA collective action. It is now apparent that Mobility's timekeeping system and formal corporate policies are lawful under the FLSA, and plaintiffs have failed to show that these lawful policies are consistently violated in practice such that it would be possible to generalize across the 4,100 opt-in plaintiffs in this case. To the contrary, the record shows an extremely wide variety of factual and employment settings among the individual plaintiffs, managers, and retail stores; this variety would in effect necessitate over four-thousand mini-trials, a result that is antithetical to collective action treatment. Hinojos v. Home Depot, Inc., No. 2:06-CV-00108, 2006 WL 3712944, at *3 (D.Nev. Dec. 1, 2006). Similarly, the defenses available to Mobility are inherently individualized. Consequently, the Court finds that considerations of procedure and fairness weigh heavily in favor of granting decertification, as the Court harbors considerable doubt that any fair determination could be achieved on the basis of representative evidence. See Johnson v. Big Lots Stores, Inc., 561 F.Supp.2d 567, 574 (E.D.La.2008) ("[T]he more dissimilar plaintiffs are and the more individuated [defendant's] defenses are, the greater doubts there are about the fairness of a ruling on the merits — for either side — that is reached on the basis of purportedly representative evidence.").

The logical implication of the Court's conclusion regarding decertification is that Mobility's motion for summary judgment must be denied. Given the wide range of factual and employment settings in this case, there are simply too many disputed issues of material fact for the Court to determine on a class-wide basis that Mobility is not liable for FLSA violations. Indeed, some of the evidence in this case suggests that certain plaintiffs may be able to recover damages from Mobility for uncompensated overtime work. Mobility's motion for summary judgment is therefore denied.

The Court now turns to a fuller elaboration of the above conclusions. By way of background, the plaintiffs in this action are "non-exempt" employees of Mobility who work as retail sales consultants ("RSCs") and assistant store managers ("ASMs"). Zivali v. AT & T Mobility LLC, 646 F.Supp.2d 658, 660 (S.D.N.Y.2009). Plaintiffs record the hours they work using Mobility's timekeeping system, "MyTime." Id. MyTime is a "punch in," "punch out" system that can contemporaneously record hours worked only when employees are physically present at the retail store or otherwise logged in to MyTime. Id. at 661-62. Moreover, only a supervisor has the ability to override the system and retroactively adjust an employee's work hours as recorded in MyTime. Id. at 662. As a result, plaintiffs allege, this system fails to capture all hours worked because (i) employees are required to review and respond to company e-mails and text messages regardless of whether they are "punched in" to MyTime; (ii) employees "punch out" of MyTime for lunch breaks despite working through them; and (iii) employees open and close Mobility's retail stores off the clock, participate in a variety of company-related activities outside of normal business hours, and perform similar tasks that are not captured by MyTime or subsequently recorded by supervisors. Id.

At the conditional certification stage, the Court found these allegations sufficient to satisfy the "modest factual showing" required at that stage that the named plaintiff "and the potential plaintiffs were victims of a common policy or plan violating FLSA." Chowdhury v. Duane Reade, Inc., et al., No. 06 Civ. 2295(GEL), 2007 WL 2873929, at *2, 2007 U.S. Dist. LEXIS 73853, at *7 (S.D.N.Y. Oct. 2, 2007). In considering Mobility's post-discovery motion for decertification, however, the Court, now afforded a much fuller record, must apply a more "stringent standard" of proof in determining whether plaintiffs are similarly situated for the purposes of the FLSA. Damassia v. Duane Reade, Inc., No. 04 Civ. 8819, 2006 WL 2853971, at *3, 2006 U.S. Dist. LEXIS 73090, at *11 (S.D.N.Y. Oct. 5, 2006). See also Myers v. Hertz Corp., 624 F.3d 537, 555 (2d Cir.2010) ("At the second stage, the district court will, on a fuller record, determine whether a so-called `collective action' may go forward by determining whether the plaintiffs who have opted in are in fact `similarly situated' to the named plaintiffs."). Although the Second Circuit has yet to prescribe a particular method for determining whether members of a class are similarly situated, district courts in this circuit typically look to the "(1) disparate factual and employment settings of the individual plaintiffs; (2) defenses available to defendants which appear to be individual to each plaintiff; and (3) fairness and procedural considerations counseling for or against [collective action treatment]." Laroque v. Domino's Pizza, LLC, 557 F.Supp.2d 346, 352 (E.D.N.Y. 2008) (citations omitted). The burden is on the named plaintiff to prove that the other employees are similarly situated. Ayers v. SGS Control Servs., No. 03 Civ. 9078(RMB), 2007 WL 646326, at *4, 2007 U.S. Dist. LEXIS 19634, at *16 (S.D.N.Y. Feb. 26, 2007). If the plaintiffs are similarly situated, the collective action proceeds to trial; but if they are not, "the class is decertified, the claims of the opt-in plaintiffs are dismissed without prejudice, and the class representative may proceed on his or her own claims." Lee v. ABC Carpet & Home, 236 F.R.D. 193, 197 (S.D.N.Y.2006).

As an initial matter, it is clear that both the MyTime system itself and Mobility's related policies are lawful. While the FLSA requires that employers "make, keep, and preserve" a record of hours worked by their employees, see 29 U.S.C. § 211(c), it does not prescribe any particular form of recordkeeping. See, e.g., 29 C.F.R. § 516.1(a) ("No particular order or form of records is prescribed by the regulations in this part."); Donovan v. Kaszycki & Sons Contractors, Inc., 599 F.Supp. 860, 867 (S.D.N.Y.1984) ("While no particular form or order of recordkeeping is mandated by the statute or regulations, the employer is required to make and maintain certain records."). There is no legal requirement that employers maintain time clocks, see 29 C.F.R. § 785.48, that hours worked be contemporaneously recorded, or that employees be permitted to enter their own adjustments to a time record without verification by management.1 Thus, My-Time is a lawful timekeeping system as long as it allows for the complete and accurate recording of all time worked by Mobility employees.

It is undisputed that the MyTime system is capable of capturing all time worked while employees are physically present in the store. MyTime employs a timestamp feature that records the precise time employees start and stop work. Declaration of Terry Fogel, dated November 2010 ("Fogel Decl."), Def.s' Decertification Ex. D. MyTime is also capable of capturing work performed off-site because it allows employees to obtain time adjustments. See, e.g., Defendant's Local Rule 56.1 Statement of Undisputed Material Facts Supporting Defendant's Motion for Summary Judgment ("Def.s' 56.1") ¶¶ 7-9 (optin plaintiffs discussing MyTime's adjustment feature); Report of Lisa M. Disselkamp, dated September 16, 2010 ("Disselkamp Report"), Def.s' Summary Judgment Ex. I at pp. 6-7, 10; Declaration of Emmanuelle Pallia, dated November 6, 2010 ("Pallia Decl."), Def.s' Summary Judgment Ex. D ¶¶ 6-8 (adjustment feature commonly used to capture time employees engage in "selling activities or other work outside the store" and to correct human errors in applying time punches). To obtain a time adjustment, employees need only report hours worked to their Retail Store Manager ("RSM"), or Assistant Store Manager ("ASM") if that duty has been delegated. The RSM or ASM then manually adjusts the employee's time to reflect the work performed. See, e.g., Def.s' 56.1 ¶ 9 (optin plaintiffs requested adjustments to time entries from managers); Pallia Decl. ¶ 7; Declaration of Karen Bennett, dated November 6, 2010 ("Bennett Decl."), Def.'s Summary Judgment Ex. A ¶ 23 ("This kind of reporting happens as a matter of routine, standard practice."). Both employees and supervisors review the records for accuracy. Fogle Decl. ¶ 7; Disselkamp Report, at p. 5, 10. The MyTime System itself, therefore is a permissible recordkeeping system under the FLSA.

Mobility's formal policies regarding timekeeping and overtime are likewise legally acceptable. It is undisputed that Mobility maintains official corporate policies that, on the one hand, prohibit working off-the-clock without pre-approval, but, on the other hand, mandate that all overtime, even if not authorized in advance, be paid. Mobility's Code of Business Conduct ("COBC"), for example, provides that "all overtime worked by non exempt employees must be paid regardless of whether the work was approved. Managers are prohibited from requiring or permitting nonexempt employees to work `off the clock.'" Def.s' 56.1 ¶ 14; Fogle Decl. ¶ 7.2 In practical terms, this means that, while employees may be disciplined for failing to obtain pre-approval for working off-the-clock, nonetheless, all such work that was actually performed will be paid for.3

Plaintiffs acknowledge that these principles are reinforced in recurring training for both managers and non-exempt employees alike. Def.s' 56.1 ¶¶ 20-21 (plaintiffs discussing Mobility's training programs). If either managers or employees violate Mobility' formal policies, they are subject to discipline. See, e.g., "Do's and Don'ts for Managers," Declaration of Robert R. Rothman, dated December 13, 2010 ("Rothman Decl."), Pls.' Ex. 61 ("DO require overtime to be scheduled and approved before worked by an employee. DON'T fail to discipline managers or employees who violate this policy."). If violations do occur, employees can seek redress through a variety of avenues, including: reporting the issue to Human Resources or a more senior manager, including the Area Retail Sales Manager ("ARSM"); raising the issue with the Communications Workers of America (the union that represents most of Mobility's RSCs and other non-exempt employees) by filing a grievance under the applicable collective bargaining agreement; and anonymously reporting the issue through Mobility's toll-free Ethics Hotline. See Pallia Decl. ¶¶ 13-16. From the face of Mobility's corporate policies alone, the Court can discern nothing that violates the FLSA. See, e.g., Eng-Hatcher v. Sprint Nextel Corp., No. 07 Civ. 7350(BSJ), 2009 WL 7311383, at *3, 2009 U.S. Dist. LEXIS 127262, at *10 (S.D.N.Y.2009) (approving Sprint's policy of "prohibit[ing] working off-the-clock and mandat[ing] that all overtime, even if not pre-approved, be paid").

Plaintiffs essentially concede that neither the MyTime system nor Mobility's formal corporate policies violate the FLSA. See, e.g., Plaintiffs' Opposition to Defendant AT & T Mobility, LLC's Motion for Summary Judgment ("Pis.' Opp'n to SJ") at 4.4 See also Colozzi v. St. Joseph's Hosp. Health Ctr., 595 F.Supp.2d 200, 207 (N.D.N.Y.2009) ("I reject the existence of the break deduction policy practiced through Kronos, standing alone, as being sufficient as a common denominator to permit a collective action on behalf of all of defendants' hourly employees subject to that practice, since something more is required in order to establish that the putative class numbers were all subject to the same unlawful practice."); Diaz v. Elecs. Boutique of Am., Inc., No. 04-CV-0840E(SR), 2005 WL 2654270, at *4 (W.D.N.Y. Oct. 17, 2005) (formal policy requiring preapproval for overtime "insufficient to suggest that all ASMs and SAs were subject to a policy of requiring but not compensating employees for overtime work"); Simmons v. T-Mobile USA, Inc., No. H-06-1820, 2007 WL 210008, at *6 (S.D.Tex. Jan. 24, 2007) ("Simmons ... has not persuaded the Court that the potential conflict between the sales quotas and policy discouraging overtime affects SRSRs in different stores equally, or even a meaningful number of SRSRs."). Accordingly, the fact that the opt-in plaintiffs track their hours using the MyTime system and are subject to Mobility's formal timekeeping policies is insufficient, without more, to demonstrate that plaintiffs are similarly situated for the purposes of a FLSA collective action.

Plaintiff argues, however, that "[t]he `legality' of MyTime's `design and implementation' is not a determinative element to any of plaintiffs' claims. That MyTime, in some contrived, theoretical way, could accurately capture plaintiffs' off-the-clock work is not undisputed proof that it actually did." Id. (emphasis removed). Similarly, plaintiff argues that "policy statements do not protect employers when their established practices are to the contrary." Id. (citing Russell v. Ill. Bell Tel. Co., Inc., 721 F.Supp.2d 804, 815 (N.D.Ill.2010) (otherwise "lawful ... policies will not shield [an employer] from liability if [the employees] can show other companywide practices that may have been contrary to those policies and violated the FLSA")). Plaintiff also argues that, notwithstanding Mobility's written policies prohibiting off-the-clock work, Mobility in fact fosters a corporate "culture" in which employees are expected to perform certain tasks off-duty. For example, plaintiffs point out that Mobility requires employees to carry Company-owned cell phones and blackberries ("Company Official Use" or "COU" devices) and encourages employees to provide this number to customers.5 They argue that this practice reflects Mobility's policy decision to have employees conduct business outside the stores. Pis.' Opp'n to Decertification at 14 (citing COBC, Rothman Decl., Pis.' Ex. 59 at MOBILITY06191438 ("Today, business is often conducted away from the office via portable devices such as wireless phones, personal digital assistants, pagers and laptop computers.")). Similarly, plaintiffs argue that employees were often required or expected to perform the following tasks off-the-clock: working through lunch breaks; opening and closing Mobility's retail stores; reviewing product information; and servicing customers outside the store. Id. at 18 (citing deposition testimony). Plaintiffs contend that these practices and Mobility's unwritten expectations created a corporate culture in which FLSA violations are common.

For their arguments to be pertinent to certification, however, plaintiffs must demonstrate that the "practices" and "culture" of which they complain are sufficiently uniform and pervasive as to warrant class treatment. See, e.g., Basco v. Wal-Mart Stores, Inc., NO. 00-3184 SECTION "K" (4), 2004 WL 1497709, at *7, 2004 U.S. Dist. LEXIS 12441, at *22 (E.D.La.2004) (finding alleged corporate policy of keeping wage low insufficient to justify conditional certification when "the `policy' was not even uniformly or systematically implemented at any given store"); Bayles v. Am. Med. Response, 950 F.Supp. 1053, 1061-63 (D.Colo.1996) (denying conditional certification when "each plaintiff's proof of violation will be individualized because it depends upon how or whether defendant's policy was implemented by individual managers with regard to individual plaintiffs, not what the policy was"). This plaintiffs have failed to do. To the contrary, the evidence points to an extremely wide range of company practices in the context of varied factual and employment settings. Laroque v. Domino's Pizza, LLC, 557 F.Supp.2d 346, 352 (E.D.N.Y.2008). Similarly, the defenses available to Mobility appear to be highly individual to each plaintiff. Id. Accordingly, the Court finds that plaintiffs are not similarly situated, and that fairness and procedural considerations counsel in favor of decertifying the class.

As Mobility argues, plaintiffs' off-duty claims involve highly individualized situations. For example, the extent to which plaintiffs received off-duty electronic communications appears to have varied widely. Some of the opt-in plaintiffs did not even receive business emails on their COU devices.6 Other plaintiffs who did receive corporate communications on their COU devices signed acknowledgements that such devices were not to be used for business purposes off hours, but that any such use should be reported to management for payment.7 Testimony regarding the expectations of management is inconsistent, with some plaintiffs testifying that Mobility managers never expected them to review company emails off-hours;8 others testifying that they left their COU devices at the store or set out-of-office notifications on their email;9 and still others testifying that their off-duty email use varied in frequency based on factors such as daily sales.10 Testimony also varies as to whether off-duty email usage was reported and compensated.11 Testimony concerning text messaging is similarly divergent, as the record contains different accounts as to whether the text messaging occurred off duty, whether it was for personal or business reasons, and whether it was ultimately reported and compensated.12 As to telephone use, some employees reported that they rarely received customer telephone calls during non-working hours,13 some said that the numbers they called most frequently while off duty were personal,14 and some reported that they responded to customer/manager calls off-the-clock while others did not.15 Expert analysis also suggests that the frequency and length of work-related off-duty phone calls varied widely.16 On the basis of this record, the Court cannot conclude that Mobility had any uniform business practices or "culture" across its 2,000-plus retail stores encouraging off-duty electronic communication. Zivali v. AT & T Mobility LLC, 646 F.Supp.2d 658, 660 (S.D.N.Y.2009).

The same problem exists with respect to plaintiffs' other allegations of practices and culture. Although Mobility requires employees to take a meal break and MyTime automatically records as compensable any break that is less than 30 minutes in length,17 some plaintiffs contend that they worked through lunch breaks without receiving proper compensation.18 However, other employees reported going home for lunch to avoid interruptions;19 others reported few interruptions even while at work;20 and still others reported punching in when interrupted (while others did not).21 Similarly, although many plaintiffs claim they were not adequately compensated for time spent opening and closing Mobility's retail stores, others testified that they were never or rarely scheduled to work an opening shift;22 others testified that "pre-punch" opening activities required only a de minimis amount of time;23 and still others testified that they obtained time adjustments if pre- or post-punch activities took longer than usual.24 The evidence also varies greatly as to whether plaintiffs were adequately compensated for meetings and trainings held off-site25 and time spent working from home performing such tasks as reviewing product information.26

Finally, the evidence shows substantial variation as to a key issue in this case: plaintiffs' use of the adjustment feature to capture otherwise unreported work. Some opt-in plaintiffs testified that they understood the adjustment feature;27 some acknowledged they regularly received payment for work reported through the adjustment feature;28 some testified they felt comfortable asking for adjustments while others did not;29 some admitted that adjustments were promptly made when requested;30 some testified that they did not report time because they did not believe it was compensable;31 and some conceded that they performed off-duty work for their own benefit without informing management.32 Additionally, expert analysis of MyTime data demonstrates a wide range in the frequency of adjustments: in some stores none of the plaintiffs' time records was edited, while in other stores greater than 50 percent of the employees/days contained edits to what might otherwise have appeared as a complete series of punches. See White Report.33 Moreover, Mobility paid more than $412 million in overtime compensation between 2006 and 2010, a fact that strongly suggests Mobility managers routinely honored plaintiffs' requests for My-Time adjustments and claims for overtime. Declaration of Christopher Dondzila, dated November 7, 2010 ("Dondzila Decl."), Def.'s Decertification Ex. B ¶ 3.

On the basis of this record, the Court finds that plaintiffs are not similarly situated with respect to their factual and employment settings.

Additionally, the defenses available to Mobility appear to be highly individual to each plaintiff. For example, plaintiffs must demonstrate that Mobility had actual or constructive knowledge of the off-duty work performed. See Singh v. City of New York, 418 F.Supp.2d 390, 397 (S.D.N.Y.2005). In the absence of a company-wide policy or practice, plaintiffs will have to demonstrate that each individual manager had actual or constructive knowledge that plaintiffs were performing off-the-clock work without proper compensation. The record suggests that the knowledge of each individual manager varies widely.34 Similarly, Mobility can defend against some of plaintiffs' claims by demonstrating that certain off-duty work was de minimis. The extent to which work was de minimis, however, will necessarily vary widely according to the particular situation of each individual plaintiff.35 Without multiplying examples, it is clear that Mobility's potential defenses in this case will be highly fact specific. Accordingly, this factor weighs heavily against proceeding with this case as a collective action.

The Court must finally consider whether fairness and procedural considerations counsel for or against decertification. Plaintiffs note that a collective action allows plaintiffs the "advantage of lower individual costs to vindicate rights by the pooling of resources," and that the "judicial system benefits by efficient resolution in one proceeding of common issues of law and fact arising from the same alleged discriminatory activity." Hoffman-La Roche Inc. v. Sperling, 493 U.S. 165, 170, 110 S.Ct. 482, 107 L.Ed.2d 480 (1989). They argue that the Court has the necessary tools to ensure a manageable trial, as the Court could bifurcate the trial into liability and damages phases, see Falcon v. Starbucks Corp., 580 F.Supp.2d 528, 541 (S.D.Tex.2008), and/or permit the plaintiffs to employ representative testimony in support of their claims, see McLaughlin v. Seto, 850 F.2d 586, 589 (9th Cir.1988).

Again, however, there appear to be very few common issues of fact in this case. The testimony of the plaintiffs is not representative and cannot fairly be extrapolated to the 4,100 individuals who have opted into this action. See, e.g., Burch v. Qwest Commc'ns Int'l, Inc., 677 F.Supp.2d 1101 (D.Minn.2009) (finding that a collective action would be unmanageable as to claims involving meal times and breaks because the claims varied enormously among the employees and by location); Proctor v. Allsups Convenience Stores, Inc., 250 F.R.D. 278, 284 (N.D.Tex.2008) ("Although the 2nd Circuit has affirmed representative testimony of only 2.7% of a class, that case involved `actual consistency' among the testimony `both within each category [of employee] and overall'; there was `no contradictory testimony'; the abuse arose from a policy that was consistently applied; and the uncompensated `periods at issue were the employees' lunch hours, which are predictable, daily-recurring periods of uniform and predetermined duration.'") (quoting Reich v. S. New England Commc'ns Corp., 121 F.3d 58, 68 (2nd Cir.1997)). Bifurcation of the trial would not resolve the issue as there is no consistent evidence as to either liability or damages. See, e.g., Aldous v. Honda Motor Co., Ltd., No. 94-CV-1090, 1996 WL 312189, at *1 (N.D.N.Y. May 30, 1996) ("[B]ifurcation is inappropriate where the `same witnesses may be needed to testify as to both the issues of liability and damages, and ... evidence pertaining to these issues may very well overlap.'") (citation omitted). Resolution of the many fact-specific issues in this case would essentially require 4,100 mini-trials in which each individual plaintiff could present evidence that he or she in fact failed to receive proper overtime compensation — evidence that would then be subject to cross-examination and similar challenge by the defendant. "Such a result is the antithesis of collective action treatment and would overwhelm the judicial system and eliminate any judicial efficiency that might be gained through a collective approach." Hinojos v. Home Depot, Inc., No. 2:06-CV-00108, 2006 WL 3712944, at *3 (D.Nev. Dec. 1, 2006).

Accordingly, the Court concludes that all three relevant factors favor decertification in this case. Unlike cases in which courts have permitted plaintiffs to proceed as a class,36 the record shows that there is simply no uniform policy or practice at Mobility that would result in systematic FLSA violations across the potential 4,000-plus plaintiff class. Indeed, the Court finds that this case is far more closely analogous to those in which courts have granted motions for decertification as a result of plaintiffs' failure to present consistent evidence that they were subject to any uniform policy or practice.37

The Court has considered plaintiff's additional arguments and finds them without merit. Accordingly, the Court grants Mobility's motion for decertification of the class. Mobility's motion for summary judgment, however, is denied, and the named plaintiff, Ms. Zivali, may therefore proceed to trial. To this end, counsel are directed to jointly call Chambers at 12:00 noon on May 13, 2011 to set a trial date. Meanwhile, the Clerk of the Court is directed to close item numbers 162 and 167 on the docket of this case.

SO ORDERED.