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samsleaf
4G Module IMEI

Hi

 

Currently running MODEM SIM7600 with Tmobile sim card, its register on the network but no data, I checked APN several times and all is good cant established PPP

Is there anyway I can manually set IMEI of the SIM7600 modem, i believe this is likely the issue why it cant get data on Tmobile network?

Your help is highly appreciated

Thanks

samsleaf
This the status of the modem

This the status of the modem

 

Cellular Modem
MODEM Status
Model: SIM7600
Network Registration: RegisteredHome
Provider: T-Mobile
Signal: -89 dBm
Mode: LTE,Online
State: NetHold
Mux: Status up
PPP: Not running
GPS: Connected on channel: #1
 
Also is there a way I can send regular txt to that sim card/cell # for commands? or status? if so how to enable this and where to add the admin cell phone in which it would respond back to it?

Thanks
markwj
markwj's picture
The IMEI is a part of the

The IMEI is a part of the modem device itself, and I don't think it should be changed.

That said, supposedly the AT command "AT+SIMEI=xxx" command will change the IMEI. Never done it, so not sure if it is persistent. I suggest writing down the existing IMEI number before messing with change it.

More likely the SIM card is not registered or activated for data service, or the APN/user/pass is incorrect, or some other compatibility issue.

samsleaf
@markwj

@markwj

I appreciate your help on this, do you happen to know what command I need to type in shell to know the current modem IMEI? I have it installed in the car in a hidden area would take me couple of hours to get it out trying to avoid that if this can be retrieved from the shell


Thanks

toug31
toug31's picture
@samsleaf

@samsleaf

I would say to try the sim card on a phone and see if data is activated. If you know how to send AT commands to modem. I am interested. I'm new using OVMS.

If you know how to send AT commands, you can try to check some ones:

AT+CGDCONT?

should return something like:

+CGDCONT:1, <Tmobile internet apn>

 

you can also try AT+CGACT?;

should return +CGACT:1,1 meaning that apn context 1 is activated.

if it returns +CGACT:1,0 it means that modem internet apn is not activated.

In any cases, you can send me the returns of the AT commands. I can help you on understanding the values. These AT commands are part of the 3GPP standard.

 

 

toug31
toug31's picture
Here are the commands on my

Here are the commands on my OVMS module

OVMS#cellular cmd AT+CGDCONT?

+CGDCONT: 1,"IP","sl2sfr","0.0.0.0",0,0,0,0

OK

OVMS#cellular cmd AT+CGACT?

+CGACT: 1,1

OK

staftek
APN for T-Mobile?

I am looking for help in getting connected with a T-Mobile SIM. First question - what is the correct APN?

Have spent many hours on the T-Mobile tech help line without success. They can see the MODEM, including the IMEI, and this information has been added to my account at T-Mobile. The first time I called them the conclusion was that my MODEM was 3G and T-Mobile no longer serves 3G. Their system reported the device was incompatible with the network. I accepted this answer and purchased the SIM7600G MODEM upgrade.

Installing the SIM7600  has not resulted in any better results. Still can't connect. Had second long call with T-Mobile support. Equipment and IMEI shows up correctly at their end.

When I monitor the operation of the modem it very briefly, perhaps a second, shows that is is registered to T-Mobile. Looks like:

Model: SIM7600

Network Registration: RegisteredHome

Provider: T-Mobile

Signal; -81 dBm

Mode: LTE, Online

State: NetStart

Mux: Status up

PPP: Not running

GPS: Not running

After this shows briefly, Network Registration changes to "Not Registered" and Provider goes blank.

The conclusion from T-Mobile tech support was once again that the device is not compatible with the network. Quite frustrating since others seem to be using T-Mobile without issue.

Any suggestions? Thanks in advance.

Stanton
Stanton's picture
Hologram

Probably not what you want to hear, but my recommendation is go with an IoT provider like Hologram; they contract out with multiple providers (T-Mo/ATT) and handle the APN selection, etc. I have used Hologram with my 4G modem and my bills are <$5/month.

It's quite possible that T-Mo will never allow such a device on their "standard" APNs...but the support folks don't know this (and probably don't understand what you are trying to do).

JNKrochman
T-Mobile

Anyone with any luck getting t-mobile to work? Same error here.

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