HTC Touch Diamond (CDMA)

I'm having soooo much problems with this phone..i wish i wasn't past my 30 day trial or i'd return it!! one of my biggest problems is that the time changes. I live if arizona. our time never ever changes. YES, i have it set to arizona time. every time i have to reset (which is all the time) or whenever it powers up, i have to remember to go in and reset the time. PLEASE, does anyone have a solution (other then buying a watch and an alarm clock) to help me with this problem???