Default [Q] 2g network problems

Hi every body.
I got a problems wiht my galaxy s2plus (gt-9105p) jelly bean 4.2.2 (device rooted). I m out of 3g network and i have only 4 apps works on 2g: opera mini, skype, facebook messenger and aptoide, but the other apps never works only on wifi. I checked all my phone settings but nothing happen.
thanks for every one.