1. Security feature to prevent unauthorized use

2. Device used to recharge the battery

3. Control to adjust sound level

4. Sound played when receiving a call

5. Chip containing subscriber information

6. Storage space for data and apps

7. List of saved phone numbers and names

8. Audio device worn over the ears

9. Famous brand known for mobile phones

10. Marketplace for downloading applications

11. Wireless network technology

12. Mobile data service for internet access

13. Mode that turns off all wireless transmissions

14. Wi-Fi access point created by a phone

15. Wireless connection strength

16. Operating system for mobile devices

17. Set of buttons to input numbers and text