Best Calling Card

I have two Motorola I 580′s.

 

One will only operate on the speaker phone. If I get a call, I have to use it in speaker phone mode. I keep it around as a spare for emergencies.

 

My pressing issue is on my other I580. It will just reboot for no reason. Sometimes, it will occur right after a call, sometimes it will just shut down, sometimes it will reboot and go to the prompt for the password (on the sim). I have not dropped it, it has not been wet, or otherwise abused. It seems to operate fine. I only have about half of my phone book filled. I don’t use any of the features such as web, email etc.

It’s very strange.

 

Could this be a software issue? Is it something I can address?

 

PS I am a computer professional so I am pretty technologicaly educated. If you  have any suggestions, please pass them on.

 

Cheers,

 

Bristol