I've been thinking about getting a phone just for use as a GPS. The model I've been looking at is the Kyocera Duraforce pro E6910 with 64GB. They are available for around 100-125 bucks. Any thoughts? I assume 64GB will handle a GPS program and associated maps. It looks like most, if not all of these are refurbished or have been used as display models but some of the ads don't specify.