Chosen Solution
without carefully reattaching it to the SIM card the iPhone thinks this SIM card is invalid.
It’s a unlock sim doodaa their flimsy silly things that sometimes work sometimes dont and trick the phone into thinking it’s unlocked… u can either contact the original network and get it unlocked properly (original network not the network ur using) or u can try putting it back in place it lays over the top of ur sim so the contacts touch the contacts on the sim :) there maybe further steps to get it to work depending on the make and model
