It looks like Globacom has adopted this free data day stuff as every month trick to attract more subscribers to their network. It's a very nice business idea that benefits the two parties concerned.

October is making it 3 straight time Glo free data day will ba made live for customers to enjoy. On the faithful day, subscribers who are eligible for the free data will enjoy
200MB , plus free chatting on WhatsApp all through the day.


According to Glo,

"All Glo customers can now enjoy a whole day of free data when they meet set of voice and/or data usage threshold within 7 days to the free data day."

But before you get so excited, note that there are terms and conditions attached to it which you must fulfill in order to benefit.

So talking about this month's free data data day, it's scheduled to take place on October 31, 2017. It's open to all Glo customers on any tariff plan. To be eligible for the free data, you will meet certain requirements;


HOW TO BE ELIGIBLE FOR GLO FREE DATA DAY
[i]To be eligible, ensure you do either of the following in the 7 days preceding the announced Free data Day:[/b]

√ Use N150 [/b]or more on voice calls PLUS [b]100MB or more of data
OR

√ Use N250 [/b]or more on voice calls.
Once you meet the requirements above, you will receive an SMS confirming your eligibility for the free data day.
[b]
NOTE:
Glo Free Data Day is capped at
200MB, plus free chatting on WhatsApp all through the day.

Details via link
http://www.wapng.net/652/glo-free-data-day-how-to-enjoy-it-on-october-31-2017