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I deactivated my SIM and activated it again, but it is not working
I deactivated my SIM and activated it again, but it is not working

Check and clear the FPLMN list on the SIM.

Jakub Kubinski avatar
Written by Jakub Kubinski
Updated over a month ago

Environment

  • Onomondo app:

    • Network Logs

    • Signaling Logs

  • Device: applicable to all

Issue

  1. SIM cards were deactivated for a longer period of time.

  2. Upon re-activating, the device would not connect again.

  3. Network Logs do not display new activity.

  4. Signaling Logs display either:

    1. No new activity

    2. invoke updateLocation responds with returnError
      (error code: operatorDeterminedBarring)

​Solution

Clear the forbidden (FPLMN) list on the SIM. You can either:

  • clear the list manually with AT commands;

  • enable manual network selection mode with AT+COPS;

  • remove and reinsert the SIM into the device;

  • insert the SIM in a phone; or

  • wait until the device moves across borders.

You can read the full manual on how to clear FPLMN here.

Cause

If a SIM is deactivated and the device tries to connect - the device will write all networks it tries authenticating with onto the FPLMN list on the SIM. This is a standard practice. Unless the device firmware has embedded logic for automatic FPLMN clearing, the issue has to be resolved by manual clearing.

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