I think it depends. We also have Verizon Wireless and had intermittant service. MGM was difficult, and EPCOT was sporadic. We were with a large group so we were constantly trying to locate each other. I don't know what some of the others in our group had for service, but it seemed we got voicemail most of the time and had to leave messages back and forth rather than talking direct. We were able to access cells, however. Our Verizon plan covers Florida, so had it been just me and my husband, I'm sure our calls would have been fine. I think when other services are in the mix, it gets more difficult. Our group probably should have rented walkie talkies instead.