My Ipad is saying invalid SIM, I own three and it was working and now all of the sudden it does this, when I go to my account
I have this problem too. But iPad mini complains invalid SIM after it's locked. Very annoying
SIM cards also can be broken or damaged. I advice you to eject the SIM card, clean the surface with an eraser
and place it again into the device. If the problem persists, contact your carrier to replace for a new one.
Hope it will be helpful
Retrieving data ...