How to use an EM7455 to see all networks and bands available

[Dan Williams]

On Wed, 2017-09-27 at 14:14 -0400, eRAGON wrote:
> OK, thanks. Since I'm in a little valley dip, I wanted to find out
> which
> carrier was best suited to go with. Is just changing the APN enough
> to
> register or it requires a SIM for each carriers' network?

It requires a SIM for each carrier, unfortunately, to register with the
network and figure out which bands the carrier is on.  You might be
able to use deactivated SIMs to at least figure out the signal
strength.

One thing you could try is to restrict the device to specific bands,
then perform a scan, then restrict to a different band, scan, etc until
you run out of bands.  However, that's somewhat error prone and I've
effectively bricked modems that way before.  But this still doesn't
tell you signal strength.

In short, there isn't a great way to do this without special equipment.

Dan

> 
> On 09/27/2017 01:51 PM, Aleksander Morgado wrote:
> > On Wed, Sep 27, 2017 at 7:26 PM, eRAGON <eRAGON at centurylink.net>
> > wrote:
> > > Thanks, I tried that but it only give the current carrier that I
> > > am
> > > connected to. How do I make it pull the same info for all
> > > carriers
> > > within range?
> > > 
> > 
> > There is also this one:
> > $ qmicli -d /dev/cdc-wdm0 --device-open-mbim --nas-network-scan
> > IIRC that also reports access technology per carrier.
> > 
> > Don't know of any command that would give detailed band info as a
> > result of a network scan.
> > 
> > The --nas-get-rf-band-info command only applies to the current
> > registered network as well IIRC.
> > 
> 
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