I just bought N73 for 1 week now. I already tried all that everyone said "error" on my N73. I also tried what amunriel said here, taking a picture and immediately change to video mode, luckily, my phone doesn't hang and restart by itself.

From day 1 I bought it, i try to fully utilised my N73 to make sure my N73 is robust enough for my lifestyle. From my experienced for this 1 whole week, I don't have any error or problem on my N73.

We must bear in mind that although N73 is categorized as Smartphone, but it is not "Smart" enough as we think of it. It is the same as Windows product like Windows XP, Windows Mobile 5 etc. All of the OS will experienced HANG if you do not use it properly. It's also the same as Symbian OS.

Have you ever find any Symbian phone that doesn't hang? Even normal phone will hang if the processes is to high, it's normal thing as long as you know how to handle it.

This is just an opinion, hope no one will scold me ok! uhuhu..