Arriving in Kona on Thursday - spending a few days on the Kona side, then traveling to the Hilo side and renting a house in Pahoa. With a big, diverse group that plans lots of activities, including hiking, Waipio, Volcano Park, etc. Several ex-native Big Islanders with us. Can anyone speak to ATT cell phone coverage? We are considering bringing our old-fashioned Cobra two-way battery operated walkie talkies with us (which have about a range of several miles depending on terrain) to keep in touch when separated on hikes etc. What do you think? I heard ATT has terrible service on the Big Island.