In a difficult situation. My new doorbell does not appear to be mountable. My door has a metal frame surrounding it that cannot be screwed into. Furthermore, windows surround either side of the doorway. There is basically nowhere to screw in the mounting plate. I tried a double-sided glue, but it peeled away after a few days. The doorway faces west, and because I am in Arizona, the heat can be severe. I considered magnets, however it appears that the plate is constructed of a nonmagnetic alloy.
Maybe I will try a stronger adhesive next time, but any help would be greatly appreciated.