Have this been covered yet? I did have a quick search but couldn’t see owt!

http://www.androidpolice.com/2012/09/25/new-exploit-could-force-factory-reset-on-many-samsung-phones-running-touchwiz/

Basically, a bug in a few android phones (was first discovered on Samsung I believe) which means that phones can be factory reset from HTMl. Quite interesting! From what I’ve read it definitely isn’t just Samsung phones either.