To change your account information tap on 'Personal details' and then on the detail you wish to change (mobile number, address, email).
On Android, you can find 'Personal details' in the menu,
On iOS, you can find 'Personal details' under the ‘Account’ tab.
If you wish to update your App login passcode please tap on 'Settings'
On Android, you can find 'Settings' in the menu,
On iOS, you can find 'Settings' under the 'Account' tab.