Can't Update factory unlocked att HTC One m7 from 4.3

[AC Question]

Hey! I've purchased a factory unlocked htc one m7 from amazon ( att ) and use it with tmobile.. As i' ve seen that 4.3 is already installed i tried to search for updates on the phone but it says me no updates available....but 4.4.2 and sense 6 is already available or ? Please help !

 

[VDub2174]

You might need to find a stock image online but let me see if I can get someone to help out

 

[SG2208]

So is it because I use tmobile on the factory unlocked att m7 or is it cause of the att interface ?

 

[RumoredNow]

So is it because I use tmobile on the factory unlocked att m7 or is it cause of the att interface ?

Yep... It's because you are unlocked from ATT and off their network. Carrier branded phones get their updates from the carrier (ATT) after they add their carrierware and pass an inspection process they run themselves, in house.

No OTA for you off T-Mobile's airwaves as you need the ATT one, not the T-Mo OTA...

You would have to download a whole image of ATT 4.3, extract it and flash the relevant bits so you don't loose data.