It's set to 2G/3G/4G
I think it's your device. Even if there's an account issue or even you service is cancelled, you would still see networks when you scan.
Remove sim card, try it in a different phone, if working, then buy another phone. if not contact PM.
No one I know has a phone with same sim size so can't check. Would a factory reset work?
For future reference, the PM 3 in 1 SIMs can be "re-assembled" if you've saved the unused frames.
@tehowennathe I sometimes have to switch Sims between phone and saved the other sizes to use when needed. I've asked at some retailers if they have any extras on hand from another activation and they've been happy to supply them as they usually get tossed out. Alternatively a SIM adapter can be bought at places like best buy for $5 or on the internet for as low as $1.