I have a 2015 Grand Cherokee Overland. I have an ongoing problem with my radio. I have the XM service as a subscription. I periodically have an issue where my pre sets on both the AM and FM sides of the radio disappear and re set to factory stations. The XM presets are not affected. I have tried to figure out a precipitating event, but nothing. Today I had an issue with the Bluetooth where i could not access an incoming call. The system telephone screen showed the incoming call after the call had dropped to voicemail and never cleared. The radio was still playing and when I turned off the vehicle and left the radio was still on. I had to take it to service and they hard reset it. No fault errors showed up on their scans. We have both an Iphone and a droid and it has happened independently when either phone had been connected. On other occasions I have been unable to make any selections on the radio.