Message: MTN Backup, service to protect your personal data (contacts, calendar..) detected your new handset. You will receive a message to configure it.Or, you're expecting a very important phone call- your phone rings and then you pick it up only to see 08034100 as the caller.
You already know what that feels like..
Now, to stop getting all these automated calls and texts, you'd have to download and install a blacklist app on your phone.
Install and run the blacklist app, then add all those numbers which you want to disable from auto-calling or texting your phone.
This should work until MTN, Airtel, Glo, and Etisalat their enable subscribers to opt-out of certain services.
Some of the numbers I blacklisted on my phone include: