comptia-a-plus-core2/labs/TRB-2-mobile-os-app-issues-lab.md

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# 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.