Originally Posted by skytbest View Post
I have a VZW Galaxy S3 that is rooted, running the latest SlimKat ROM (probably not important, but just in case). I have a T-mobile nano sim that I was thinking of activating for a month just to test out their service and see if I wanna switch.

Would it be as simple as activating the SIM card online and popping it in my phone? Is there anything else I need to do? Like maybe something with APNs?

You might have to add a T-Mobile apn, but I know that when I switched carriers and then flashed a new rom, the apns were automatically set for that carrier. Maybe you can reflash the system and see if the apn gets automatically set.

Sent from my Unlocked SCH-I535 running whatever rom I've chosen for the day.
Droid RAZR M all the way! Unlocked-Rooted-Stock KK