Motorola E815 / E816 Hollywood

I got my E815 with Verizon Plan a week before and I am repeatedly loosing calls. I cannot complete a call about 50% of the time, it gives the message "call lost" or no message without any audio alert. Sometimes it is every minute or even when the other phone is just ringing. Plus I have echo problem. The signal strength is always 5 bars. I think it is a software problem. Do I have to return this phone and get the other e815 or there is any other way to fix it? Please help.