One of my work colleagues just went to check her phone, and there was a message something like "Verification failed". She was prompted to put in her lock code and did so (these may have occured the other way around, not sure sorry). Next thing the phone is factory resetting?
Anyone come across something like this before? It is a Spark branded J5, not sure if updates were being applied or anything, which seems to be a common thread on some XDA threads.