[Q] LG F180(Optimus G) topic

I tried to install a custom ROM in the device but soon after it's boot I realized the network is not working, I tried to recover my stock ROM by CWM and all the old things came back. But the network is still not working, when I tried to search manually for Network Operators, then some other operators come in search but my network operator is not listed in them. I tired to search too much but useless. Please can anyone help me with it.. :(
My IMEI is present and the phone shows it.