Credo 24/7 instant Step Buy airtime through all network Lipa na mpesa paybill 755557 Account number: your phone No i.e 070000000 Amount Pin No transaction FEE btn 5 bob and 100 Transaction cost 5 - 100 = 0 101 - 999 = 23 1000 - 4999 =34 5000- 9999 = 85 Customer care 0725951788