N7000 Gps problem

Hi,

I have a problem with Gps quality on my Note. Earlier it was very fine, but after flashing some ROM (I don't remember when exactly), it became very weak. Bad fixing, jumping from road to road, incorrect display. I tried various modems, resetting settings some gps fix apps. But problem still exists. Any help would be very nice. Thanks.

Sent from my GT-N7000 using xda app-developers app