Answered question
I bought and activated the plan recently and while calling works, i cant receive Mms messages and my data seems to only work on facebook messenger and sometimes my mails get updated, ive manually set the apn properly but it still doesnt work as apps like Instagram, Google search and reddit say they cant refresh because theres no connection while they work properly with Wi-Fi. How do i fix this?
You probably have an Android phone I suspect.
Modifying your existing APN settings doesn't seems to works for some users.
So try delete the existing one, and create an new one from scratch manually.
Be careful for typos and auto correction overwrite.
Best of luck
Cheers :))
Other answers
What phone do you have? Android or iPhone?
My phones an android and I tried deleting the existing APNs and making a mew one from scratch but the same issue still persists.
Don't forget to restart your phone once you've followed Rene D. suggestion
Check for typos...very easy to make a mistake...happened to me. Good luck.