S9+

[Ummais]

Anyone know why I keep getting the stop sign on my phone? It is so annoying that i can't receive calls or make calls and disconnects from Wi-Fi or data. So basically the phone becomes useless. 

I have reset  to factory setting but that hasn't helped.

[BandOfBrothers]

If this was my phone I'd try putting the phone in Safe Mode which disables your downloaded apps and leaves the stock ones working and then see if things improve.

If they do then come out of Safe Mode and start deleting your most recent apps one at a time as one maybe clashing. 

If things aren't improved in Safe Mode then I would go to a Samsung Experience Store or Samsung Service Centre.