Used the device for a long while (without sim) amassing a huge number photos and work files very important to me....
finally put an active sim card in. Without any prompts, phone begins downloading an update, then powers down to 'install update' then proceeds to reset and 'erasing data' ....
Boots up into setup as if i just got the phone.
All my apps, photos, data gone.
A) Is it possible to recover my data
B) why on earth did it do thiss
[Samsung Galaxy S7 Edge with Telus (Canada) sim card]