I've noticed that a few people from other places on the net were having a similar (if not identical problem), however I never really found any fixes or what the cause is. So here's what happens: I've noticed when I'm in places with very little, to no signal... my SGS goes in to a coma like state. It's still technically on, but unresponsive to everything. The only way to get my phone back on is either removing the battery, or hard reset (holding power button for 10s). I've only really noticed it being bad in 2 places... a certain building in my college which has a lot of interference from a server farm in the building... and my girlfriends house (which just has crappy reception). However the bug has happened while riding the train through an underground tunnel a few times, and random places. Any ideas?