SARA-R410M-02B - Auto Registration

Networks & Coverage
1

I am configuring the u-blox SARA-R410M-02B modem for auto-registration using the AT+COPS=0 command. However, I noticed it connects to AT&T IoT (AcK: 7), which is fine but want to verify will it prefer to AT&T network over other available networks?

  1. Could this be due to the SIM preference set in the Monogoto dashboard? Does the sim give
    preference to AT&T over Verizon or T-Mobile?

  2. For testing purposes, is it possible to switch the preferred network to another provider?

Thanks

2

Hi @vnaik

  1. AFAIK the module connects to the network with the best network quality. You can disable the device to connect to specific networks in the advanced console, see:
    Override Roaming Policy | Docs

  2. If you run the following AT Command, the module scans and reports all available networks in range (note: this may take a couple of minutes).

    AT+COPS=?

    Next, you can select an operator manually using AT Commands (I wouldn’t recommended this as the device won’t switch to other operators when the module has bad coverage. See: AT Commands | Docs

Hope this helps!

3

Thank you, This is good information.

Is there a preferred/recommended MNO profile for the SIM?

I am mostly connecting it the US cellular network.

Thank you

4

IMO you better keep all options open, allowing the module to select the best network in range.

5

Hi vnaik!

have you considered setting the user preferred network list using the AT+CPLS command? Our SIM cards feature the user controlled list. Note that the network listed in the user controlled file are a ‘recommendation’ and not an enforcement.