My Galaxy S7 still says AT&T software and firmware after switch


    Recently moved from AT&T to T-Mobile, everything (voice, data, text) seems to be working BUT my phone boots up with an AT&T logo, there's all sorts of AT&T crapware still on the phone, and I can't seem to get the latest Android version. Also there some pesky things like the AT&T software build doesn't seem to have a Call Barring feature exposed which is not cool.


    I've a Galaxy S7, firmware is G930AUCS4APK1 running Marshmallow 6.0.1 OS.


    I can't be the only guy to switch carriers, from AT&T to T-Mobile, and I also can't be the only guy to move over with their S7 they got when at AT&T.


    So reaching out for some guidance:


    1. I'm not sure I'm getting all of my security patches anymore, or am I as the device firmware suggests its an AT&T build but I'm no longer an AT&T customer?

    2. is there a standard procedure for situations like mine, which can't be unique for customers switching like I am, where I can upgrade my S7 to Nougat with proper T-Mobile firmware too? After all isn't there also a complete firmware update when Nougat is installed with T-Mobile?


    many thanks for any help on this ...

      All replies

      • magenta1824141

        Update for the community, for those who came over from AT&T with their unlocked devices.


        Just got off a call with T-Mobile Tech Support, and nice enough guy but the message back is we are all screwed if we were hoping for any software updates (or security patches?) from T-Mobile. Best as I can tell T-Mobile (only?) pushes patches and updates to any device on their network with their firmware number only.


        Again, nice enough Tech Support but ... its 2017 and while patching / updating software is not trivial, its also not impossible to do better today. You'd think there'd be a smarter way to deal with this backend process, considering every phone has a unique ID!


        Just wanted to share with the community ... heads up, and if anyone does find a way to get their updates someway / somehow please let us know.  Thanks ...

          • stevetjr

            You are correct in that you will not get the updates OTA via T-Mobile.  Even though it appears that T-Mobile is sending the update it is actually still coming from Samsung's servers, just the OTA notification is only looking for the TMO model number when the phone is on their network which of course yours isn't a TMO model number.


            There is still a way for you to get updates however and that is to use Samsung Smart Switch.  If AT&T has released an update it will be available for your device via smart switch.


            While the devices appear the same there are sometimes small differences in the firmware because of network capabilities and TMO devices especially have to have a lot of extra firmware since they have the most advanced network out there.  So the radio for one but also things like wi-fi calling, RCS messaging, GoGo inflight messaging, etc all have to be incorporated at an OS level which is why each carrier has it's own slightly different version of the OS and updates come out on completely different schedules because Samsung has to program them each individually.


            There is a way but it is not sanctioned or supported by TMO not to mention if you mess it up it bricks your phone but using software called ODIN and some searching/research on XDA Developers and you can find the software files needed to essentially convert your device from an AT&T version to TMO version but as I previously said if something goes wrong..........

              • magenta1824141

                Stevetjr - awesome.


                That's more than an acceptable answer for me as a customer. Already have the Samsung Smart Switch software and it is a handy set of bits for anyone with a Samsung phone. Would just have been less stressful if T-Mobile published the (alternate) process somewhere. I'm sure customers moving to T-Mobile would understand and appreciate that they can really BYOD in terms we can understand.


                Again awesome response ... many, many thanks ...