If you're using a Lezyne GPS what phone are using the Ally v2 app with? The phones list given by Lezyne is short, and are mostly pricey phones. I'm thinking of getting smartphone, and want to pick up something sim-free and cheap that works with GPS. My top choice is an Asus Zenfone, but not listed on Lezyne's guaranteed to work list. So what phones have you guys have luck with or have not had luck with?