Quad lock is the way to go imo, you can get a universal fitting that sticks to any case, I just bought a rigid case for the phone, it works a dream, if it starts raining just put in your pocket.
I've had a few different things and this is solid as a rock, used it for a 1000k ride so well tested.
Second this, quadlock is the only worthwhile option. You’re best off with their phone specific case but you can use the universal kit with a 3rd party hard plastic (not rubber) case if they don’t make one for your phone.
Quad lock is the way to go imo, you can get a universal fitting that sticks to any case, I just bought a rigid case for the phone, it works a dream, if it starts raining just put in your pocket.
I've had a few different things and this is solid as a rock, used it for a 1000k ride so well tested.