I live and travel on the "cusp" of digital / analog Verizon service. My V60i has a bad habit of switching from digital to analog from time to time although I'm clearly in a digital signal area. I used to use a Kyocera 6035 which had the option of selecting digital only service so I didn't have that issue. I can't find a way to do this w/ the v60i. Is there a way to avoid this switching back and forth from digital to analog?