3G iPad - No Sim Card Installed
I have a iPad 2 GSM 3G
I replaced the digitizer on it, I am unsure if it related by it does not recognise any sim cards.
I check the continuity with the multimeter from the sim tray contact points and no wires/traces are broken.
For some reason when I remove the screen for the second time it magically got recognised again. It worked for a few hours and overnight it has stopped working again.
Is the screen possibly blocking the antenna or shorting it out or something?