Anyway to update OS on AT&T phone running on T-Mobile network?

[AC Question]

I have an I537 model from when I was on AT&T network. I switched to T-Mobile, so unlocked phone, ran phoneutil.apk and did some changes through the QPST software. So phone itself it working, but running on only 4.2.2 OS. I would like to have the latest T-Mobile OS of 4.4.4. Is there anyway to do this, as phone right now wants to only check AT&T for updates?

 

[LeoRex]

Doesn't look like T-Mobile ever carried the S4 Active, so they won't have an OS for it. Your best option is to manually load the right AT&T firmware for your phone. Luckily, there is plenty of information as to how to do just that. XDA has a good thread that explains the steps and includes screenshots and links to several different versions (http://forum.xda-developers.com/galaxy-s4-active/general/guide-update-to-i537-att-firmware-t2835481)

 

[Kelly Kearns]

You can also go to Best Buy and have them flash the newest update for free.