Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Using a random UMTS USB stick (Huwei 160 or something like this) works an current Ubuntu pretty much out of the box and the setup via network manager (nm-applet) is convenient.

But it does not display the current signal strength or modes of operation (which speed-mode is used etc.).

What are useful tools to display/monitor such information?

share|improve this question
up vote 2 down vote accepted

Since version 0.8.1 of network-manager is already all-inclusive (

Otherwise you can use umtsmon (

or vodafoneMobileConnect (

or bcm (

if you have a too old version of ubuntu that does not allow you to update network-manager.

share|improve this answer
What does "all-inclusive" mean? I can't find any info about connection mode in network manager (it shows the signal strength in the icon). – Mladen Jablanović Apr 19 '14 at 18:26

There is nothing much that I am aware of that does this. I have written my own scripts that monitor the second usb serial connection and query for signal strength.

Send a AT+CSQ and you will receive:

+CSQ: n

n is in the range 1 - 31, to convert this to dBm subtract 111

This is detailed in the GSM / 3GPP spec

share|improve this answer
Ok, this is a start. What is the most convenient way to send such control sequences from a script? – maxschlepzig Sep 3 '10 at 18:48

modem-manager gives that info on "info" tab:

modem-manager 3g connection info

share|improve this answer

This screenlet works for me- WirelessScreenlet

You need to install screenlets first from the software center.

share|improve this answer
Hm, does it really supports UMTS? This page does not mention UMTS. – maxschlepzig Aug 25 '10 at 7:45

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.