I recently dropped my workhorse VX4400, and now the sound quality in the earpiece is degraded. There is an audible vibration that wasn't there before. I carry the insurance through Assurion, and they tell me they don't have any VX4400s, and would upgrade me to a VX4500. I would get a new home charger and car charger. But I also have a number of other accessories (spare batteries, travel charger, etc.) that I would still want to use. My question is this: Does anyone know firsthand whether VX4400 chargers and batteries can be used on the VX4500? Also, how well does the VX4500 work in marginal areas? My wireless is my only phone, and reception is fairly spotty in my house. My VX4400 reverts to analog at times, but the VX4500 is digital only. Also (yes I know it was only supposed to be one question!) does Bitpm work on this phone? I have all my contacts backed up on my PC, and it would be very nice not to have to re-enter them all. Thanks, everyone!