Many telecom's providers especially in Nigeria really do deduct money from its subscribers account with no reason by sending plus caller tune unknowingly which is actually killing some other network providers in this country, its also give the network subscriber headache as they can not enjoy what they recharge in their sim-cards as credit, and this time GLO is also involved in this terrible act.
So if you happen to be the type of people that don't like deduction of money from their account by receiving annoying value added services from GLO it's time to stop them by deactivating all their value added service subscriptions which actually leads to mass deduction of your money from your line either knowingly or knowingly by Glo.
To Deactivate/cancel Glo caller tune service, text dereg to 7728 as sms...
NOTE: If it happens that you don't know the paricular service that always deducts your airtime, then text UNSUB to 8888 without quotes to unsubscribe from all 8888 annoying services.
Hope this update is helpful? do share with us if there is any stubborn service that you think it unstoppable!