How to get Etisalat 4GB free data

Etisalat Nigeria, one of Nigeria's best network provider is here with
a free offer for their subscribers.
Etisalat is giving away 4GB free this April, this offer is for new and
old customers.
How To Get Etisalat 4GB Free Offer.
1. Send DATA as sms to 8186 or dial *8186# or *8186*1# on your
Etisalat sim card continuously.
2. Wait for some minutes; you will receive a message saying "Your
request is successful. You have been granted a one-off 4GB data
plan valid for 30 days".
3. Dial *228# to check your data balance.
The data works on all devices and you won't be charged for it so
don't be afraid.
Below is a screen shot of mine.