how to check glo data balance on mtn?
['MTN: To check your data balance on MTN do the following: Text 2 to 131, or simply dial *559# or text 403 to 131.', 'Glo: To check your data balance on Glo, do the following: ... ', 'Airtel: To check your data balance on Airtel, do the following: ... ', 'Etisalat: To check your data balance on Etisalat do the following:']