Nokia should state if this reboot issue is SW/driver issue or a (unsolvable) HW issue. So far they have been dodging the whole issue judging by the bug-tracker comments. Returning/replacing a device can be a PITA sometimes when ordering from the net.

Reboots on mine are getting more frequent, and it is well beyond usable. Since Nokia is unable to state what is wrong, or if it is fixable, I have to return mine as well. This is low end by Nokia.

Charging from USB cable, it is rock steady. Replaced batteries with one from a 5800 - no change (reboots every 10 min when used). Sitting on the table - can go for hours or days? without rebooting.