Unhappy i need a stock rom or a suitable rom!!!

hi guys,

i have samsung galaxy s ii gt-i9100 (gsmh)..i flashed with a stock rom gb 4.1 (I9100XWLSD_I9100OJVLS6_XSG) n i have a problem with network detection..can anybody offer a solution??? any stock rom??? any best custom rom??? plsss...

thnx