Samsung Problem: Galaxy Note 4 randomly restarts automatically
A few people have encountered the dreaded random reboot issue with their Note 4 handset. The phone will simply restart itself at random intervals with no obvious cause.
- If you’re using a Micro SD card in your Note 4, then that’s the first thing to check. Remove the card from your phone and test to see if the random reboots still occur. If the reboots have stopped then back up the data from the card on your computer and try reformatting it on the Note 4 via Settings > Storage > Format SD card.
- You could try a factory reset. Make sure you have all your data backed up. Go to Settings > Backup and reset > Factory data reset > Reset device > Erase everything.
- Contact your retailer, carrier, or Samsung and arrange a return and replacement.