How to check which service Viettel is using on the phone
the use of too many services in the phone will sometimes cause your phone money to be deducted for unknown reasons, even though there is no use of that service. therefore, it is
Tags : prepaid subscribers
Instructions for adding Viettel prepaid subscription information right at home
to help readers easily register and not take a long time to go back to this article network administrators will guide you how to do this directly on the phone without needing to go
Customers who switch from prepaid to postpaid will not charge
the ministry of information and communications has issued a document asking operators not to charge for prepaid subscribers who switch to postpaid ones.