With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cGgsnSATotalPrepaidUsers
Cisco Ggsn Service-Aware Total Prepaid Users
1.3.6.1.4.1.9.9.497.1.1.3.28
This object indicates the total number of prepaid users.
Back to CISCO-GGSN-SERVICE-AWARE-MIB MIB page.
IPHost Network monitor allows you to monitor cGgsnSATotalPrepaidUsers on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.