Technical Neanderthal questions:

I switched from a cellphone (LG) to a 650 and love the combined phone/planner. I dumped my IPAQ in the process, which I don't miss.

I always assumed that reception quality was dependent on the cell provider's system and not the phone itself (in that all phones were pretty much alike). I find that I am losing signal, or getting that obnoxious "no signal" sound from the 650 much more frequently than I did with the LG (in fact, I never lost a signal with it).

The questions:

1. Does the quality of the phone's reception vary with the phone a great deal, and why?
2. Anything I can do about it?

Thank you.