Wireless Joint

Im using a sprint sim with a WiFiX-NEXQ6GO with a Quectel EM12-G CAT12 M.2 Modem. I used to get band 25 but the past few weeks i seem to be stuck with band 12 and my speeds suck. How can I band lock to 25 with the setup I have? I cant seem to find it in the settings dashboard.

Bandlocking is done via AT commands:

I copied this from a previous past and stored it as I use it on my EP06-A but I believe the commands are the same for all quectel based modems:

Enter the following AT commands, and write down your original band values before changing anything.

AT+QNWINFO < Current band in use
AT+QCFG=”Band” < Current bands config
AT+CSQ < Check signal strength


To configure single LTE bands or combinations, use the following AT Commands:

Band# - AT Command
2
AT+QCFG="band",0,2,1
4
AT+QCFG="band",0,8,1
5
AT+QCFG="band",0,10,1
2+4
AT+QCFG="band",0,a,1
2+4+5
AT+QCFG="band",0,1a,1
12
AT+QCFG="band",0,800,1
2+4+12
AT+QCFG="band",0,80a,1
2+4+5+12
AT+QCFG="band",0,81a,1
2+12
AT+QCFG="band",0,802,1
4+12
AT+QCFG="band",0,808,1
5+12
AT+QCFG="band",0,810,1

All bands:
AT+QCFG="band",0,42000000003300185a,1

All bands for the EP06-E specifically:
AT+QCFG="band",8d0,1a1880800d5,0

Or use the default value you have written down earlier for your particular modem.
On some modems you have to use this command format:
AT+QCFG="band",2e0,<band_value>,0

Band_value - Band#
1 - LTE BC1
2 - LTE BC2
4 - LTE BC3
8 - LTE BC4
10 - LTE BC5
20 - LTE BC6
40 - LTE BC7
80 - LTE BC8
100 - LTE BC9
200 - LTE BC10
400 - LTE BC11
800 - LTE BC12
1000 - LTE BC13
2000 - LTE BC14
10000 - LTE BC17
20000 - LTE BC18
40000 - LTE BC19
80000 - LTE BC20
100000 - LTE BC21
1000000 - LTE BC25
2000000 - LTE BC26
8000000 - LTE BC28
100000000 - LTE BC33
200000000 - LTE BC34
400000000 - LTE BC35
800000000 - LTE BC36
1000000000 - LTE BC37
2000000000 - LTE BC38
4000000000 - LTE BC39
8000000000 - LTE BC40
10000000000 - LTE BC41
20000000000 - LTE BC42
40000000000 - LTE BC43
20000000000000000 - LTE BC66
400000000000000000 - LTE BC71

For specific band combinations, simply add the hex values together using a hex calculator.
For example: Band 2 (2) + Band 12 (800), therefore the summ in (x) = 802
Or use a band calculator posted in the forum.
These changes take affect without requiring a reset or reboot.
You will have to wait about 5-10 seconds for the switch to occur.

Link to original forums post by BillA
Its like the 5th post down
https://wirelessjoint.com/viewtopic.php?t=674

There is also a spreadsheey somewhere on the forum but I have had better luck doing it manually

The short answer is this command should do it:

AT+QCFG="band",0,1000000,1
Just be aware locking the band to 25 exclusively will also keep your modem from using CAA on any band but 25 as well. A better practice is to selectively EXCLUDE the bands you know you dont want, leaving it free to roam to the other bands that might be useful for CAA.

Thank you! I'm entry-level at best with this stuff. I followed another user on here who posted how to get sprint sim to work with this modem and his AT commands. This was over a year ago and with all the changes going on with Sprint and T-mobile and my speeds seeming to disappear I'm not sure if the settings are the best for my situation. I need help figuring out what my settings need to be and a step-by-step on what AT commands I need to use. Speeds are good on Band 25 but rarely see that band now, sometimes when I restart the modem. The modem seems to want to connect to Band 12 and it's slow to unusable.

While I still dont recommend this, as its a bandaid fix, as stated above this one command will lock you to band 25
On the router go to
modem
misc
and in the AT-Command area copy paste the below
AT+QCFG="band",0,1000000,1

Then click on send command

You should get an ok in the box below the send command button

then click on system (on the left side)
reboot
click the perform reboot button

wait for the router to connect back up and your done and will ALWAYS be on band 25

AGAIN you really should put some time in and learn how to look at the different bands and settings and make a much better more custom solution. Lots in here can help you with that but it can be pretty time consuming.

Thank you again! I am in the process of learning Bands and AT commands. Locking to band 25 works great and I have my speeds back.

Hey I have the exact same setup you have and couldn't get my Sprint sim to work so I went to visible.

Would you mind telling me what apn you're using for Sprint?