Why does my aquos r2 phone restart when I turn on mobile data

[Mpagi George]

It restarts automatically when I open WhatsApp

 

[B. Diddy]

Welcome to Android Central! Does it also happen in Safe Mode? https://www.hardreset.info/devices/sharp/sharp-aquos-r2/safe-mode/ (You won't be able to test WhatsApp, but at least you can see if mobile data still causes it to reboot.)