So i'm planning a trip to Japan, and because of some regulatory stuff the Verizon iPhone 5S won't work on their networks. I'm planning on renting a portable WiFi hotspot so I can have data while I roam around Japan. My question is, since the iPhone gets it's accurate GPS from the A-GPS chip, and my cellular radios will be shut off (ill only be using WiFi from the hotspot), will the iPhone still be able to get accurate GPS coordinates?