When I work with Lumia 920 for a while back of the phone gets hot and if I try to open camera the phone freezes or restarts, even after restarting the phone camera won't start until the phone cools down ! Does anybody has this problem or not ?
it seems HTC 8X also has this problem
In that case the issue is with WP8. We need to wait for couple of WP8 upgrades in order to get this stability