there are two different ways that you could use a palm centro on the t-mobile network... although its risky because its not really allowed on the tmobile network, you can still manage to do this...first you would have to get the phone from a different provider and then do one of the two methods. 1) you could pay for a code that would unlock the sim lock on the phone or, 2) you could download a software thats available for purchase and download online. either way it will unlock the sim lock on the phone and allow tmobile on the Palm Centro phones.
hi if your palm centero mobile is locked to some other network then it wont accept your t-mobile network sim unless you unlock it .codes are the best solution to unlock it .to get codes visit simpleunlocking.com here they ask you the imei number of your mobile .finally they send you codes to unlock your mobile .once your mobile get unlocked it will be free to accept all network sim in it.