With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c3gModemActivationStatus
Cisco 3G Modem Activation Status
1.3.6.1.4.1.9.9.661.1.2.3.1.2
Modem activation status.
Back to CISCO-WAN-3G-MIB MIB page.
IPHost Network monitor allows you to monitor c3gModemActivationStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.