- Dec 20, 2014
- 2
- 0
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Hi, my S4 model is SGH-I337, Baseband version I337UCUAMDL. My carrier is ATT. Everytime I check for update it's telling me my device is up to date. However, I'm stuck on 4.2.2 since I received my phone and my friend have 4.4 already. Help?