SLOW mogul help me please :(

[escasey88]

I purchased a mogul from a friend a while back. It was slow when he had it and became slower and slower so i did a hard reset. This didnt affect the speed but recently it kept giving me a message "cannot complete call, the signal may be unavailable or phone number is in incorrect format" or something to that affect. i tried going to airplane mode then turning the radio back on but it wouldnt turn the radio off. finally i soft reset the phone and it took a total of 45 minutes to boot up. I've concidered flashing a new rom, and i have also considered taking it out back and shooting it... I would love any suggestions.
WOW Almost an hour ago i tried to make a call but it locked up on the dialing screen. i walked away and the phone just now said connected and made the call.