Can I use a Motorola Backflip (AT&T) on a different carrier?

[redspyda209]

I would prefer to use it on t-mobile.

[Unregistered]

I would prefer to use it on t-mobile.

Yes,You can do it.
If you want to use T-Mobile carrier on your Motorola backflip phone means,You will need to unlock your mobile.You can unlock your mobile using network unlock code.It's one of the best and safe way to unlock your mobile.You can get an unlock code from your service provider or else try to buy an unlock code from any one of the online unlocking service provider like Unlock-Zone.com and you can get free mobile unlock instructions from MobileUnlockGuide.com I hope it will be very useful to you.