Over the last week my Lumia 950 Dual Sim has started crashing a rebooting consistently every few minutes and then goes through a period of working well for a few hours then i swipe down from the notification area and its crashes again. I wasnt on the insider programme, just normal updates so was on the latest version, 10.0.14393.189. I did a soft reset to start with to no avail. I then removed the SD which did nothing. I removed the sim cards again nothing to prevent it restarting. I switched the SIM cards around and had some luck until the evening when it staretd rebooting again. I then decided to enroll in the release preview to see if that sorted the problem nope. Finally i went to the Fast ring to see if that would do anything. and it worked for about 5 hours with a hard reset. The only thing i havent tried is to use the device recovery tool but i am not holding out much luck, Anyone got any suggestions as to why the phone would suddenly starting doing this?