The screen of a Samsung phone is broken completely and I want to take it to a repair shop, but before that I prefer to erase all data on it.
But the phone is marked as offline.
It has no SIM installed now but is powered on and vibrates from time to time like when emails and other messages are received. So, I thought it must be connected to the home wifi. Scanning on Linux with Wifi Guard, I can see one supplementary device connected that must be this phone, but it is still reported as offline on that site.
Should I insert a SIM for the remote erase procedure to work? Or would a wifi connection suffice? - in which case I'm wrong saying it is already connected to wifi etc.