HELP ME with Emergency Calls Only, Technical Problem, SIM Blocked

Updated My Blackberry Classic to 10.3.3.1435, The Phone is behaving erratically with reception errors like Emergency Calls Only, Technical Problem, SIM Blocked. I restarted phone several times, Signal Comes and after few hours the same error messages..I tried OS versions 10.3.3.2049, 10.3.3.2163, via auto loaders but the problem is still there..I tried to clean the SIM Slot and realign the SIM tray but nothing is happening. Please help me I am frustrated...

Does the SIM card work fine in other devices?

I would guess that it is the SIM card. I had a similar issue when I updated to the latest OS on my Classic. Although my problems were with MMS. I suggest goin to ur provider and askin for a new SIM card. It worked for me

**Classic, Q10, Bold 9900, Bold 9000...do u notice the pattern? :-) ...the KEYone is NEXT!**