Will GPS tracking work if I don’t have network or Wi-Fi signals on mountain? Cellular service or Wi-Fi is not required to use GPS tracking. Related articles What is Epic Coverage? What should I do if my phone runs out of battery? How can I adjust who is in my household on the My Epic App or on Epicpass.com in My Account? Will Mobile Pass & Lift Tickets work if I don’t have network or Wi-Fi signals on mountain? How do I turn on GPS tracking for the day?