Need Help HUWEI g6-L11

Hi friends
I have a Huwei g6-l11 handset with a software of vodaphone
now the phone is in Pakistan but the problem is when we insert the sim card of 3G it works perfectly but when we try to insert 2g simcard it didnot work (neither registered on network neither give any signal) Emergency call only

I want to use 2g simcard what i have to do
I also unlock it but it didnot work for me
Please help me what i have to do further to get access on 2g simcard on network.

Br Habib