I'm using an unrooted Droid Razr with Android 4.1.2 on Verizon's network. This weekend I drove about 2 hours through areas with hit and miss cellular signals. About 60 miles into the drive to my destination, google play music threw an error playing a song, and then when I clicked or skipped to any other song, I would still get the error. I literally was unable to play ANY song on my local device using google play music (I do not use the cloud for music storage, this is all on my external sd card). Slacker radio still worked perfectly fine. Even after power cycling the phone google play music refused to play any local file. When I arrived at my destination, after about 15 minutes I decided to try my phone and play music seemed to be working fine. So at this point I had the following list of potential culprits in the order I suspected them: 1. Cellular connection causing play music to break (which I was pissed about because all of these files are stored locally on my sd card). 2. Bluetooth and google play music breaking after a certain amount of time. 3. The charging cable being connected and overheating something. 4. A problem with the external SD card. On the way back, I decided to set my phone on airplane mode and use play music to see if it was the cellular connection. I left the phone charger unplugged as well. After about 1 hr and 15 minutes, the exact same issue occurred. Slacker radio still streamed fine over bluetooth. This eliminated #1 and #3 as the potential culprit. When I got home, I played music on my phone without it being connected via bluetooth to anything, and it played music for well over 2 hours just fine (I've never had this issue with playing music before and have used it for many hours). This eliminated #4 as the potential culprit. So now I'm left with #2, that play music + bluetooth is only capable of streaming music for approximately 1 hour and 15 minutes before completely crapping out. My questions are: 1. Could it be anything else? 2. Has anyone else experienced this? Thanks!