Default [Q] invalid Sim Card

Hey guys,

I've been trying to install a custom rom with qdroid patched.
I was previously on .290, flashed a non lte firmware to downgrade by accident, and lost sim access. After which, i reverted to .290 and all works well.

However, when i tried to root .290 directly and flash another qdroid patched rom (cm10.2), the phone cant detect sim card again.

Any suggestions as of how i can avoid this?

Any advice is most welcome. =)