Question: how to check glo data balance on mtn?
Answer: 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: