If the phone is still under warranty (either Nokia's or an extended warranty you purchased through your mobile provider), then I'd return it to be repaired. Otherwise, it's not likely something you'd be able to fix yourself.

It would help to know who your mobile provider is because that will limit your new phone choices. In general, Motorola makes a good phone if you can stand the interface and you're not buying version 1.0, if you will. Nokia makes some good phones, too (especially for non-CDMA providers, which it sounds like you have). One thing to consider is whether you will have to buy new accessories (cases, headsets, etc.) because the stuff for your Nokia was specific to that phone. You might want to get another Nokia just to preserve that investment or lower the cost.

As for refurbs, I have never been burned by buying a refurbished electronic product -- in fact, now I almost seek them out, because they're checked individually to make sure any problem has been solved and they're usually significantly cheaper than brand-new. And, particularly with cell phones, products are refurbished because customers tried out the phone and 1) didn't like it; 2) didn't have service from that provider where they expected to; 3) found out they couldn't afford a cell phone. It usually has little to do with a faulty phone and more with the fact that your mobile provider can offer them as refurbished rather than "used".

I am with Cingular, but I don't generally buy very many accessories.
Thank you for your reply.
Don_na_na