Last time down I purchased an unlocked Alcatel flip phone prior to leaving. Stopped at a Digicel in Mobay and had them insert a SIM card for me. Easy peazy. Then you can buy minutes at almost any store if need be. Not great for surfing the web but I just wanted it for the exact same reason you mentioned.....contacting our driver for a ride when we needed to or to make a reservation at a restaurant if necessary. Nice to have in case of emergency as well.