Updating software

[shergenrader]

I have a Galaxy S6 edge. I was on AT&T and just switched to T-Mobile. The software on my phone currently is Android 5.1.1. When I try to update it checks the AT&T software update and says my phone is up to date. I need to update to 6.0 or 6.1 according to T-Mobile so I can use wifi calling. Any help??

 

[SpookDroid]

Unfortunately you still have an AT&T phone, so there are two 'locks' on that for you to update:
1) The update for AT&T phones has to be available. Even if it's out for other models, if the AT&T one isn't available, your phone won't get the update.
2) AT&T has a nasty habit of locking updates to their network even if the phone has been unlocked to be used with other SIM Cards. This means that unless the phone detects an AT&T SIM Card, the update server won't allow you to get it.

I'd recommend just asking someone with an AT&T chip to let you use it to download the update (if available) over WiFi (or data if the chip has unlimited data). Be careful, though, on how the phone was unlocked. Updating it might cause root/unlocks to be 'lost' (if you lawfully unlocked it with a carrier-provided code, it shouldn't bean issue).