# Lab TRB-2: Mobile App Troubleshooting Checklist

Domain:
- 3.0 Software Troubleshooting

Works on:
- Android
- iOS

## Goal

Practice safe mobile troubleshooting checks without deleting personal data.

## Part 1: Pick One App

Choose a noncritical app.

Record:
- App name:
- App version if visible:
- Last update status:
- Storage used by the app:
- Permissions granted:

## Part 2: Battery and Storage

Record:
- Available device storage:
- Top battery-using app:
- Battery saver mode status:
- OS update status:

## Part 3: Connectivity

Record:
- Wi-Fi connected:
- Bluetooth enabled:
- NFC enabled, if present:
- Airplane mode off:

## Part 4: Scenario Matching

Choose the best first checks:

1. App will not install.
2. Bluetooth headphones will not pair.
3. Phone battery drains quickly.
4. Screen will not rotate.
5. App crashes after launch.

## What You Should Learn

- Mobile troubleshooting is usually low-risk checks first.
- Storage, updates, permissions, and connectivity solve many app issues.
- Avoid factory reset unless simpler steps fail and data is backed up.