Default [Q] s2 plus i9105p shows not registered on network,,,plz help

hi,i have s2 plus with a problem of not registered on network,i am in pakistan and here 5 gsm networks,one is zong working perfect on gsm mode,and the second ufone is working perfect when i select wcdma/gsm auto connect mode,the other three networks not working at any setting and saying not registered on network,when i search manually then the only two network found which are already active at this device,

what is the problem and how to fix it?
plz help me.