If you want assistance from the Community Forum then you'll need to provide a bit more information and context than that.
When was it working ok last?
Are your APN settings configured correctly?
Are incoming/outgoing calls and texts working ok?
Do you have an active monthly membership plan with a non-zero mobile data allowance balance?
Does it make and difference if you reseat the SIM and reboot the phone perhaps?
If you need to contact 48 support about this then see the links in my signature below.
