Motorola V600

is has to do w/ reception, satelite reception has to be more precise them towers (like Verizon Wireless). all cell phone work off of satelites but some work from the tower to the satelites like Verizon. there are what 7 settings for sound, plus loud, soft, ring n vibrate n vibrate on the phone. loud's not going to be loud if u hav it one Volume 1 or 3. u can sell this, no matter the problems. another thing, each time u switch between the type, not the volume # u can hav three ring tones for incoming calls. i don't kno if u read the manual. all phones hav "bugs" a little unstable part of a program that makes it run iregular then it was intended to. i'd say once maybe every two weeks my phone wuld say no service, unregisterd SIM (i got at&t). the phone doesn't hav weird things it would erase saved data on it, but something like that would happen w/ the sim card for. i just turn the phone off, take the battery out, slid the sim out then in, put the battery back, turn the phone on. what it's 2 mins out of u'r life for a little cause. i've never had a problem with three way calling or switching over to another call (call waitn). could be a number of problems with your service in your area.