If you have to restart it frequently, I would try to return it and change it for a different mobile. You don't expect your DVD player to crash, and you should not expect your mobile phone to crash because it has Windows in it!
Slightly offtopic:
I recently had to develop an app in Windows Mobile, and I was surprised at how little the OS had changed since I last used Windows CE... in 1998. It's so far behind the iPhone OS that it's not even funny (and to add injury, we were told not to use HTC devices because they were too slow). It was like going from Windows 7 / Leopard to Windows 3.11 (with a pretty start screen). And people buy it!!
If for some reason you don't want to go with the iPhone (which is probably the best option right now), go for something with Android or the Palm Pre (and avoid the Storm).
If you have to restart it frequently, I would try to return it and change it for a different mobile. You don't expect your DVD player to crash, and you should not expect your mobile phone to crash because it has Windows in it!
Slightly offtopic:
I recently had to develop an app in Windows Mobile, and I was surprised at how little the OS had changed since I last used Windows CE... in 1998. It's so far behind the iPhone OS that it's not even funny (and to add injury, we were told not to use HTC devices because they were too slow). It was like going from Windows 7 / Leopard to Windows 3.11 (with a pretty start screen). And people buy it!!
If for some reason you don't want to go with the iPhone (which is probably the best option right now), go for something with Android or the Palm Pre (and avoid the Storm).