[T-Mobile Samsung Galaxy S7 Questions & Answers] larry_thagr81:
Short Version

Ok guys, I know I'm not alone on this and I can't find anything on it so I decided to start this thread. I believe the most recent TMobile update that occurred 09/2017 for the Samsung Galaxy s7 has either broken my Bluetooth or is causing some process to lock up and continuously use the CPU once I connect my Gear s3 to my Galaxy s7 or disconnect my Gear s3 from my Galaxy s7. The symptoms are the inability to smoothly stream music via Bluetooth, increased battery drain on the phone because now I can only make it about halfway through my workday vs more than a full day like it used to be and an unresponsive phone most noticeable during the time shortly after connecting or disconnect from my Gear s3. I've had my Gear s3 now for roughly two months and this hasn't been an issue up until this last week of 09/2017. The only thing that has changed was I did a TMobile software update within the past week or so.

Long Version

As I mentioned up above I've had my Gear s3 Frontier was for roughly a couple of months now and everything worked perfectly when connecting and disconnecting from my phone most of the time. The few times I've had an issue it was with the Gear s3 battery draining faster than usual and that was able to be addressed with a restarting of the Gear s3. However I'm having connectivity issues with my Gear s3 and my Galaxy s7. The Galaxy s7 seems to be struggling to disconnect and reconnect to my Gear s3 because the streaming of my music starts to skip and pauses for periods at a time and I can't get the screen on my phone to come on during that time because the phone is working overtime doing something behind the scenes for a minute or two. Even once the phone becomes responsive again, the music continues to periodically skip and the battery on the phone is draining much faster than normal. When I'm at work I stream music all day and occasionally turn on the screen of my phone to check a message that I may not be able to fully see on my Gear s3 so outside of that the screen on the Galaxy s7 remains off. I typically work 10-11 a day while streaming music via Bluetooth the entire time from my sd card via Play music. By the end of my workday, I typically have 27% to 35% of battery left on my Galaxy s7 and this is what I'm used to. What's weird is that prior to me streaming music when I connect my Gear s3 to my Galaxy s7, everything appears to be ok, but once I start streaming music and then I get too far from my Galaxy s7 causing the two devices to disconnect via Bluetooth then connect remotely and reconnect via Bluetooth upon coming back within range of my Galaxy s7 that's when all my problems start. Since today is a non-workday for me, I plan to do a little bit of further testing and see if I can determine what exactly is causing the battery drain. I used to be really savvy at this troubleshooting stuff when I had nothing but time on my hands to install apk that could monitor things but not anymore. So if you guys have any recommendations for diagnostic/monitoring tools that don't require root then please let me know.

The quick fix:

My fix to this so far is to turn off Bluetooth on my Gear s3 so that my watch is forced to connect remotely and only then do my Galaxy s7 symptoms go away. I've already ruled out the portable speaker as the culprit because the same issue exists whether I'm streaming music to my portable speaker or streaming music in my car. I figure since the phone seems to be the one that's causing all the headache then it must be the phone.