Oh it is 100% affected, reading up on it online it appears that even if I did the required firmware flashes to get it up to the required standard (can make 000 calls on 4G), the telcos are just blocking the model by IMEI regardless. Fark.

I am too overwhelmed to techify my way out of this at short notice. Have a spare, compatible phone that I use for work that I can pop this sim into now so that the service doesn’t get cancelled. Will just order a cheap burner to tide me over until shit is less jangled