I have a Moto Z2 Force and it randomly reboots several times per day. It will do it sitting on the desk or in my holster. I have gone to the Verizon store, I have gone through troubleshooting online and done the manual software update. It had the most current version already, it just re-installed. I do not know if it is a bad phone or what. I do not have a memory card in it, my work does not allow them.