em20g not band locking

Forum rules
Use the SEARCH function for related topics PRIOR to posting a new topic on the same subject.
Post Reply
Mcons
Posts: 12
Joined: Sun Aug 02, 2020 3:50 pm
Has thanked: 0
Been thanked: 0

em20g not band locking

Post by Mcons »

No matter what command I put in for bands it continues to use whatever band it wants, I've tried factory reseting it.
"AT+QCFG="band",0,10003000000"
OK
Command i use and it connects to band 2 instead
Viper67857
Posts: 166
Joined: Wed May 13, 2020 7:04 pm
Has thanked: 12 times
Been thanked: 45 times

Re: em20g not band locking

Post by Viper67857 »

I think you need a ,1 at the end to enforce it immediately, else it takes effect next reboot.
Mcons
Posts: 12
Joined: Sun Aug 02, 2020 3:50 pm
Has thanked: 0
Been thanked: 0

Re: em20g not band locking

Post by Mcons »

Viper67857 wrote: Sun Aug 16, 2020 4:01 pm I think you need a ,1 at the end to enforce it immediately, else it takes effect next reboot.
So
"AT+QCFG="band",0,10003000000,1"?
Mcons
Posts: 12
Joined: Sun Aug 02, 2020 3:50 pm
Has thanked: 0
Been thanked: 0

Re: em20g not band locking

Post by Mcons »

Attempted different command still not locking bands at all even when I try to force just one
Yipzy
Posts: 212
Joined: Wed Jan 30, 2019 2:06 am
Has thanked: 7 times
Been thanked: 82 times

Re: em20g not band locking

Post by Yipzy »

Mcons wrote: Sun Aug 16, 2020 7:31 pm Attempted different command still not locking bands at all even when I try to force just one
Do you get an OK response after issuing the command?
Viper67857
Posts: 166
Joined: Wed May 13, 2020 7:04 pm
Has thanked: 12 times
Been thanked: 45 times

Re: em20g not band locking

Post by Viper67857 »

Idk... I only have an em12-g to play with. Bear in mind that all em-20g are engineering samples as there has never been an actual production model. I think quectel has pretty much abandoned it for the time being.
User avatar
Didneywhorl
Posts: 3609
Joined: Fri Mar 23, 2018 5:37 pm
Location: USA
Has thanked: 1359 times
Been thanked: 754 times
Contact:

Re: em20g not band locking

Post by Didneywhorl »

Mcons wrote: Sun Aug 16, 2020 2:37 pm No matter what command I put in for bands it continues to use whatever band it wants, I've tried factory reseting it.
"AT+QCFG="band",0,10003000000"
OK
Command i use and it connects to band 2 instead
Your band lock is for Sprint bands 41, 25 and 26. How are you connected to band 2 if your using a Sprint SIM card?

Also the command doesnt have a " at the end

Code: Select all

AT+QCFG="band",0,10003000000
User avatar
Didneywhorl
Posts: 3609
Joined: Fri Mar 23, 2018 5:37 pm
Location: USA
Has thanked: 1359 times
Been thanked: 754 times
Contact:

Re: em20g not band locking

Post by Didneywhorl »

adding a

Code: Select all

,0,1
at the end does make it apply immediately I believe is tehe proper syntax.
AT+QCFG: "band"[,<WCDMA_bandval>,<LTE_bandval>,<TDS_bandval>[,effect]]
TDS_bandval isnt used, default 0
User avatar
Didneywhorl
Posts: 3609
Joined: Fri Mar 23, 2018 5:37 pm
Location: USA
Has thanked: 1359 times
Been thanked: 754 times
Contact:

Re: em20g not band locking

Post by Didneywhorl »

If you've factory reset it make sure you run the command

Code: Select all

AT+QPRTPARA=1
This makes the settings backup in NVRAM again. (Basically)
Mcons
Posts: 12
Joined: Sun Aug 02, 2020 3:50 pm
Has thanked: 0
Been thanked: 0

Re: em20g not band locking

Post by Mcons »

Didneywhorl wrote: Sun Aug 23, 2020 12:24 pm Your band lock is for Sprint bands 41, 25 and 26. How are you connected to band 2 if your using a Sprint SIM card?

Also the command doesnt have a " at the end

Code: Select all

AT+QCFG="band",0,10003000000
I had a period of time on my tmobile sim where I could use sprint lte bands and now I csnt all of a sudden
User avatar
Didneywhorl
Posts: 3609
Joined: Fri Mar 23, 2018 5:37 pm
Location: USA
Has thanked: 1359 times
Been thanked: 754 times
Contact:

Re: em20g not band locking

Post by Didneywhorl »

Tmo has been jacking with quite a bit lately
bstock
Posts: 3
Joined: Tue Sep 29, 2020 8:49 am
Has thanked: 0
Been thanked: 0

Re: em20g not band locking

Post by bstock »

Didneywhorl wrote: Sun Aug 23, 2020 12:24 pm Your band lock is for Sprint bands 41, 25 and 26. How are you connected to band 2 if your using a Sprint SIM card?

Also the command doesnt have a " at the end

Code: Select all

AT+QCFG="band",0,10003000000
I am on a Sprint Sim and connected to T-Mobile band 2 and it is working. I left the APN blank and forced it to band two and it worked. I am not recommending this, but it worked for me. The Sprint bands would give me inconsistent connections with varying d/l and u/l speeds.
Post Reply

Return to “Quectel Modems”