Check airtime balance
MTN Awuf>> *559*14#
MTN >> *310#
GLO >> *310#
GLO 5x >> #555*5#
AirTel >> *310#
Etisalat >> *310#

Check data balance
MTN (SME) >> *323*3#
MTN (Corporate) >> *323*2*4#
MTN >> *323#
GLO >> *323#
AirTel >> *323#
Etisalat >> *323#