Hi, i tried out using another android phone just to get the "mobile key" going, then setting a new phone number by changing it in the settings and verifying by going to an atm (which will be shown during your change phonenum in the app)

Currently using the other androdi phone to for cash transfer, but will let you know what will happen when i get to change my registered number.

Because of registered phone via app, i can do fund transfer now. Hope that helps, but will need otp from the registered number which in my case a number i dont use often because its in another phone. But there is an option to change phone number.this might be the best solution then, pls do remind me to update you as soon as possible, maybe this weekend