---
title: Reboot sim
description: "Restart the modem hosting the SIM and measure how long it takes to re-register on the network, as a reset between scenarios or as a measurement."
lastUpdated: "2026-09-23"
---

> **For AI agents:** the complete documentation index is at [llms.txt](/llms.txt). Append `.md` to any page URL for its markdown version.

Restart the modem hosting the SIM and measure how long it takes to come back and re-register on the network. Use it to reset state between scenarios, or as a measurement in itself: registration time is a meaningful network KPI.

## Parameters

| Parameter | Required | Description |
| ----------- | ---------- | ------------- |
| Wait for network registration after reboot | No | Wait until the SIM is registered again, with a timeout of 60 to 240 seconds. Default: on, 120s. |

## Results and metrics

In the action report (`result`):

| Field | Description |
|-------|-------------|
| `restart_duration_ms` | Time for the modem to restart. |
| `wait_network_duration_ms` | Time to re-register on the network. |
| `duration` | Total execution time in seconds. |

In Analytics, each run feeds the restart measurement with `restart_ms`, `wait_network_registration_ms`, and `duration_seconds`, tagged by status, antenna, and access technology.

## What's next?

<Columns cols={2}>
  <Card title="PDP Activation" icon="network-wired" href="/tests/actions/cellular/pdp-activation">

    Verify data comes back after the reboot

</Card>
  <Card title="USSD Command" icon="hashtag" href="/tests/actions/cellular/ussd">

    Resume the scenario on a clean modem state

</Card>
</Columns>