How can I check if I have a constant 4G connection?


on my D-Link DWR-921 LTE router, at least one of the LEDs indicating the connection type doesn't seem to work correctly. The LED indicating the 4G connection only flickers from time to time instead of flashing constantly. I have never noticed the LED indicating 2G/3G connection flickering or flashing (but this may be due to I never have a 2G/3G connection).

I don't know if this is a bug related to OpenWRT or if there's some hardware issue (or maybe the behavior of the LED is normal, but I don't think so). In LUCI, the LED for 4G was shown as "off". I have set it to "on", but this didn't lead to any change.

Anyway, I'd like to make sure that I really have a constant 4G/LTE connection. I have looked everywhere in LUCI, but found no entry indicating the type of cellular connection.

If it should be the case that the router can't provide a constant 4G connection, I would consider switching to another ISP or replacing the router.

So my questions are:

  1. how can I check that I really have a 4G connection in LUCI or through the command line?
  2. is there a way to find out if the router ever falls back to 3G or 2G temporarily? For example, would this be mentioned in the system log?

Thank you

3ginfo? download and install it manually:
I am not sure which package for your D-Link DWR-921 LTE but it works well for me on TP-Link Mr200.

Thanks, I'll have a look at that.

But is it really necessary to install an additional package? Is it not possible to check the connection type from the default configuration?

Does anybody have another idea?

the vast majority of people don't have mobile wireless ISPs so it would be surprising if tools to manage 4g modems were included in the default distro

uqmi -d /dev/cdc-wdm0 --get-signal-info

uqmi you already have because you use it for connections.