What am I doing wrong with AT&T?

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Adm1jtg
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Re: What am I doing wrong with AT&T?

Post by Adm1jtg » Sat Jun 05, 2021 4:01 pm

Sometime the default band the router chooses is not the optimal band. In my own situtation I am a verizon user and I have the following bands available:
2,4,5,13,66
for me 2 and 13 are absolute garbage. Meaning either poor quality or porr signal strength. % is the best balance of strength and quality overall but my router wouldnt always pick 5 as the band to use. There is an at command spreadsheet on here somewhere so that you can issue an AT command to tell your router to ONLY use specific bands, thereby skipping or excluding the bands known to perform less well.

I cant find the spreadsheet but will copy paste from a forum post I have bookmarked on how you can do this manually.

While it doesnt state it in the text below I have found I need to reboot the router after issueing the commands:

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.

JohnnyDaMitch
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Re: What am I doing wrong with AT&T?

Post by JohnnyDaMitch » Sat Jun 05, 2021 4:37 pm

I appreciate those answers. Thanks!

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