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

eRAGON eRAGON at centurylink.net
Wed Sep 27 19:34:34 UTC 2017


OK, so I will try to get a SIM to test out Sprint first. Given this,
what SIM card part number will work (be compatible) with the EM7455?

http://www.prepaidphonenews.com/2016/07/how-to-determine-which-sprint-sim-works.html


On 09/27/2017 03:10 PM, Dan Williams wrote:
> On Wed, 2017-09-27 at 20:48 +0200, Fabian Schörghofer wrote:
>> https://maxwireless.de/wp-content/uploads/2016/01/6820-Netzliste.jpg
>>
>> The card is used in the AVM Fritbox 6820.
>>
>> AT+XCELLINFO
>> AT+XMETRIC
> 7345 is an Intel XMM device while the 7455 is a Qualcomm one.  I'm not
> aware of any Qualcomm AT commands to do this for all cells via QMI,
> unfortunately.  I looked though the Gobi dumps and can't find anything
> useful there.  You can get adjacent cell informaiton, but I'm pretty
> sure that's only for the same operator.
>
> Dan
>
>> 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 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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