Can i unlock an iphone 4 and put a sim card from t mobile in it?

Can i unlock an iphone 4 and put a sim card from t mobile in it?

I'm afraid thats imposible cuz you can use micro sim only for i phone not a normal sim

It depends on what Modem Firmwaare you have

Yes You can Unlock I-phone 4. You can use Remote Unlock service to Unlock it… Visit the site http://www.simpleunlocking.com/apple-iphone-4/rs16wp9/ get the remote unlock service and unlock it easily. Then use with other GSM Network sim card in it like T-mobile.

Yes you can factory unlock it and use any sim card from t mobile or other networks.
my friend unlocked his iPhone through this website: http://officialappleunlocker.com/
they unlocked my friend's iPhone in 12 hours they just got imei # and unlocked it.

We can help you @ http://www.iUnlox.co.uk