Default [Q] I8190l signal problem

Hi, I have an i8190L. This problem after a crash. I repair it with z3x and apparently all it's ok.
Now in the screen alternate the no sim symbol and the signal bar symbol (without signal) in a infinite loop. When it alternate the phone is very slow. If I activate the fly mode the phone is normally fast.
Actually it have the stock ROM and itīs rooted.
Please help me.
I use the search and I just try all possible solutions in the forum.