does t-mobile work in mexico?? any1 knows?? ?

Ya sure t-mobile sim will work in mexico only if your phone is unlocked one else if the phone is locked to some other network provider in Mexico then it wont accept t-mobile or any other GSM sim until you unlock it ..You can easily unlock the phone using sites like Unlock-Free.com here they are generating network unlock code for some older mobile models at free of cost .Else if you want to unlock some other new model phones then visit sites like Unlock-Zone.com here they are rendering network unlock code for all mobile models at reliable cost .After unlocking the phone you can freely use it with any GSM sim .