I agree with Pat@Amber. I just started buisness 8 months ago in SF Bay area and am staying very busy taking calls on a cell phone or an hour later on voicemail. It is very impressive to the clients, especially when the are just running through the phone book. If you are busy at the moment check your voicemail when you go to the truck. I've found Verizon the most reliable in my area with best coverage and hardly ever a dropped call.