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Re: AT&T galaxy s4 active to tmobile prepaid?
I just went through this...it wasn't as easy as I expected, thus I'm posting to help others want to use a AT&T S4 Active on T-mobile; I found that my voice and data service was spotty, even nonexistent because of the AT&T network/APN configurations. If you have any issues, the following should resolve:
Once you unlock the phone and insert your T-mobile SIM.
1. Set your APN setting to what T-mobile provides on their site (T-Mobile internet & MMS APN settings | T-Mobile Support) . Make sure any and all characters, even, "*" are cleared from fields that do not have settings. One you have adjusted/saved the APN settings, restart your phone.
2. Pull up your dial pad and enter *#*#4636#*#*. Press "Device information", below all the phone's data, touch the grey box displaying the network type the phone is set to. Press the network type, A list will appear-> select "LTE/GSM auto (PRL)". Hit the home button, restart phone.
From there, your AT&T Galaxy S4 Active should work on the prepaid T-mobile SIM without issue.