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Why does AT+COPS return previously rejected network as "available"?

FPLMN is not always updated after a single rejection or failure to register.

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

Environment

  • Device: applicable to all

  • SIM: FPLMN

Question

  • Why does AT+COPS return previously rejected network as "available"?

  • I removed one of the operators from the Network List. When device wants to register on that network - it gets denied, which is good. But when running AT+COPS=? command, the modem shows that network as "1" - available. Is such behavior expected?

Answer

  • The modem does not always update the FPLMN list after a single rejection or failure to register.

  • It highly depends on the device firmware logic and how it handles FPLMN.

  • For add. questions around device behavior - consult this with the modem / module manufacturer.

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