how to get signal strength of 3g modem?

[satya gowtham kudupudi <satyagowtham k gmail com>]

NetworkManager preventing to use AT+CSQ by locking modem device file. There isn't any method like getSignalStrength in NetworkManager gdbus object. 

nm-applet was able to display signal strength in system tray. so there should be a way to get signal strength form network manager!

nmcli is command line counter part of nm-applet. Can i get signal strength using nmcli? nothing about signal strength is mentioned in its man pages.

 

- Gowtham