Would Cage be so adept at using cell/smart phones?
He's in prison for 10 years, is out an hour, pulls a smart phone out of an envelope & immediately answer it.
Then he's comfortable enough with a new cell phone to assemble it (with a magically fully charged battery) & set up call forwarding to it from his smartphone.
This is a flaw, right? I'm not just being pissy? I've had to teach my parents how to answer their GD phones & messages so many times I just can't see it.