I solved this same issue, this might work for you too. Shut off your phone. Pop out the SIM card and place it on a thick piece of paper, use an exacto-knike to cut an outline of the SIM card on the paper. You can also draw an outline with a pen/pencil of the SIM and cut the outline. Try to be as precise as possible and dont exceed the outline, trim excess if needed. Then place the paper cutout in the SIM tray, place the SIM above the cutout on the SIM tray and pop it back in. Turn on your phone and you should get signal. If the SIM cant be popped back in, use a thinner paper, likewise, if this solution doesn’t work, test it out with a thicker paper/multiple layers of thin paper.