How do I update my cell phone with no carrier?

After the Fire Phone no Prime fiasco I returned it and bought an unlocked AT&T LG G Flex 2. I've never owned a smartphone before and have made due with my old dumb phone and iPod Touch. I see that many of these phones need to be updated through the carrier. I ran the LG software and it says the phone doesn't need an update. Everything I've read says the phone has been updated to 5.1.1 and is supposed to receive a 6.0 upgrade down the road. Will putting in an AT&T sim allow it to update? If not do I get a month's of AT&T service to update the phone and then go for something cheaper? I really don't use wireless much, I rarely go above 60 minutes a month. I'm more concerned about data when there's no Wi-Fi around. AT&T and the virtual providers that use their network is the only GSM service around here. If I went with Cricket would it update through the AT&T network? What do I have to do to update my phone?

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But since you are not on a carrier why update?

And let me share that I'm on so I can control the data on/off at as well as my phone. Updates just work and I have the data portion turned off and it gets it over WiFi.

About those that say yours has 5.11. This is a royal mess as one AT&T LG G Flex 2 may not be the same as a run of the mill factory unlocked paid full price LG G Flex 2. I'll also not write about XDA Forums where you can get other roms.

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Re: cell phone update

R. Proffitt: Thanks for the reply.

As far as updating I thought it would be good to have the latest version of Android, especially Marshmallow. The phone is AT&T branded (H950) even though it has an unlock code, so I assume the same updates should be available. I just heard about the XDA forums, but until I get more knowledge, I'm kind of afraid of bricking an expensive phone.

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re: Cell Phone Update

Ting seems like a great service. However they use the T-Mobile and Sprint networks which are unavailable here, so not an option for me. I live out in the sticks and AT&T and Verizon and the virtual providers using their networks are the only options for me.

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Info overload coming your way. is like a sip from the fire hose as there are now many MVNO's that use AT&T towers.

Republic Wireless from what I'm told will switch to Verizon when there is no Sprint tower.
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re: Info overload

Thanks for the site. Very good synopsis of services. I've been looking for something like that for awhile and haven't been able to find it.

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