### For Android Devices
1. **Power Off the Phone**:
- Long-press the power button and click "Power Off."
2. **Use Key Combinations**:
- **Common Method**:
- Press and hold the **Volume Up** and **Power** buttons until the logo appears.
- Release both, and the recovery menu should appear.
- **Alternative Method** for some devices:
- Press and hold **Volume Down + Power** or **Volume Up + Home + Power**, depending on model specifications.
3. **Boot into Recovery Mode**:
- Use volume for navigation and power button to select items.
### For iPhones
1. **Power OFF the iPhone**:
- Press and hold the power button until you see the "slide to power off" slider then slide to power off.
2. **Using Key Combinations:
- **iPhone 8 and Later**:
- Connect your iPhone to a computer.
- Press and immediately release the **Volume Up** button, followed by doing the same with the **Volume Down** button, then press and hold the **Side Button** until you see the recovery mode screen.
- **iPhone 7 and 7 Plus**:
- Connect to a computer and press and hold the **Volume Down** and the **Side Button** until you see the recovery mode screen.
- **iPhone 6s and Earlier**:
- Connect to a computer and press and hold the **Home** and the **Top (or Side)** button until you see the recovery mode screen.
### Important Notes
- **Backup Data**: When it is possible to do so, always back up your data before entering recovery mode.
- **Manufacturer-Specific Variations**: Some manufacturers have key combinations that are specific to them. Best check the device manual or the manufacturer's website for precise directions.
If you have a specific phone model in mind, then I can detail further!
