Many people have been encountering problems trying to configure there Phone for internet using Airtel Push method, this method allows them to push the settings to you over the Air.
But this method is Not supported by all Phones
To configure manually use the below settings
Name: Airtel Nigeria
Port: Use 80, if it doesn't work use 8080
Protocol: Ipv4 and Ipv6
Leave the remaining blank and try to connect
If it doesnt connect call customer care on 111 to call out the settings for your device