• CELL
  • Beginner
  • 5 min
  • Serial CLI

Recipe · Beginner · CELL

How to list SIM phonebook contacts

Use CELL mode to display contacts stored on a SIM card through a cellular modem phonebook command.

Cellular modem with SIM card and radio signal.
Start with read-only checks, then move to write, replay or automation only when the setup is understood.
Step 1

Commands

Use the shortest command path that matches the documented firmware workflow. When a mode needs setup, follow the prompts shown on first entry.

Result

What it means

The command path is working when the target responds and the firmware prints the expected menu, status or captured data.

Troubleshooting

  • Re-enter the mode setup when pins or peripherals are not already initialized.
  • Check common ground and target voltage before blaming software.
  • Prefer Serial CLI for long captures or high-volume output.
  • Repeat the read or capture to confirm stability.

Next steps

  • Save the output in your project notes.
  • Compare the result with the full wiki page for mode-specific details.
  • Create a shorter alias if you repeat this workflow often.

SIM phonebook FAQ

What does phonebook read from?

It reads contacts stored on the SIM card through the cellular modem AT interface. It does not read contacts from a smartphone or cloud account.

Why is the phonebook empty even when the SIM works?

Many modern SIM cards do not store contacts, or the operator/module may expose a limited phonebook profile. An empty list does not mean the modem is broken.

What privacy precautions should I take?

Use the command only on your own SIM or authorized test cards, and redact names or numbers before saving logs or sharing screenshots.

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