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

Fabian Schörghofer fabian.schoergi at
Wed Sep 27 18:48:26 UTC 2017

The card is used in the AVM Fritbox 6820.


might be the AT commands to do this. Haven't tested it though as I don't
have such a card.

Am 27.09.2017 20:32, schrieb eRAGON:
> Interesting....what commands do you use and why (what's different?) that
> the EM7455 cannot?
> On 09/27/2017 02:25 PM, Fabian Schörghofer wrote:
>> 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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