Recharge at least N100 on your MTN line if you have insufficient airtime balance.
Now dial *123# on your dialer with MTN set as default for calls.
You will see a pop-up menu, reply 3, reply 3, reply 6, reply 1 and reply 1 to select MTN Wechat Plan.
You want to subscribe to the MTN 10gigabytes data plan, so select N100 for 10GB.
After successful activation, dial *131*4# to confirm your data balance.
Terms and conditions apply