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How do I get my device to register on GSM?

Check GSM registration status on the device with AT+CREG? command.

Jason Godfrey avatar
Written by Jason Godfrey
Updated over a month ago

Environment

  • Devices: Applicable to all

  • Cellular technology: GSM

Issue

  • How do I get my device to register on GSM?

  • I am not seeing any GSM network logs on my device and I am trying to send SMS.

Solution

  1. Make sure there is GSM available on the network the device is registered on.

  2. Check GSM registration status on the device with AT+CREG? command.

    1. The modem should respond with: 0,5 - registered to a roaming network.

    2. If any other value is returned, attach to the network following device manufacturer's instructions and try again.

  3. Try re-configure SMS

  4. Send a test SMS to the device once you see "Attached GSM connection" in Network Logs.

  5. If the issue persists, contact Onomondo Support.

If you are sure that your device is registered with the network on GSM, but the SMS Console returns absentSubscriber, it is possible that the local MSC (Mobile Switching Center) has no memory available to handle SMS at this moment and/or it is prioritizing local SIMs over roaming SIMs, placing your SMS in a queue until memory becomes available again.

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