38Chapter 17 . Tools
17. 4 Calculator
1. On the Home screen, tap Tools -> Calculator.
2. Tap numbers and use the arithmetic feature to complete an operation.
17. 5 Downloads
On the Home screen, tap Tools -> Downloads to view the download information.
17. 6 System Update
1. On the Home screen, tap Tools -> System Update.
2. Tap Check for update.
3. Follow the pop-up prompts to update the system.
17. 7 Feedback
1. On the Home screen, tap Tools -> Feedback.
2. Enter your feedback.
3. Attach the snapshot.
4. Tap Submit. Then the technical support will help you solve your issue.
17. 8 SIM Toolkit
On the Home screen, tap Tools -> SIM Toolkit to configure the settings.
Note: Please insert a SIM card before you launch SIM Toolkit.