What problem are you having exactly?
Wifi is a local area network issue and nothing to do with the phone network.
But I presume you actually mean carrier data/internet access while out and about?
If you're having a problem with that then try deleting your internet/APN settings and reconfiguring them from scratch using these instructions.
https://community.48.ie/t5/Other-Help/Internet-not-working-on-HUAWEI-ASCEND-g6-u10/m-p/34493/highlig...If that doesn't help then post back with more detailed info and/or contact 48 support.
See the link in my signature below.
Hope this helps.