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

Fabian Schörghofer fabian.schoergi at
Wed Sep 27 18:25:14 UTC 2017

Sierra Wireless EM7345 can do this.

Am 27.09.2017 20:21, schrieb 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>
>>> 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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