I have a T-Mobile Motorola flip-phone. I want to put the sim card into an AT&T Motorola Backflip.?

I've called both companies back and forth and the Motorola company and I haven't got a straight answer.

If you want to insert a T-mobile SIM card from a Motorola Flip phone to an AT&T network locked Motorola Backflip, you need to unlock the cell phone in prior. You can unlock an AT&T network locked Motorola Backflip safer and easier using unique unlock code. You can get the unique unlock code for your Motorola Backflip from MobileUnlockSolutions.com at affordable cost with an easy unlocking guide. Good luck.