17.12.16 Why do I have to record my fingerprint for several times? ............................................................................. 296
17.12.17 Why can't I enroll my fingerprint successfully? .............................................................................................. 297
17.12.18 Why can't I use my fingerprint to unlock my phone when a third-party screen lock application starts? ......... 297
17.12.19 Why can't I unlock my phone or enroll my fingerprint when I swipe my finger on the fingerprint sensor? ... 297
17.12.20 How can I access the file safe when I am not able to use the fingerprint unlock feature? ............................... 297
17.12.21 How can I access the App lock when I am not able to use the fingerprint unlock feature? ............................. 297
17.13 How do I delete a recorded fingerprint? ............................................................................................................... 297
17.14 How do I disable fingerprint unlock? ................................................................................................................... 298
17.14.2 What happens to my fingerprint data when I restore factory settings? .............................................................. 298
17.15 Is Touch-disable mode also applicable to my phone's fingerprint module? .......................................................... 298
17.16 What are the working principles for the continuous detection of fingerprint unlock? .......................................... 298
18 Dual systems ............................................................................................................................ 299
18.1 Does my phone support dual systems? ................................................................................................................... 299
19 Others ........................................................................................................................................ 300
19.1 Why does the vibration not strong when I enter a number on the dialer screen? .................................................... 300
19.2 What can I do if I can't find a solution in the FAQs to the issue that I have encountered? ..................................... 300
19.3 How do I download the User Guide of my phone? ................................................................................................. 300
19.4 Why can't I view the User Guide in phone services? .............................................................................................. 300
19.5 Is it possible that my phone has two IMEI numbers when I enter *#06#? ............................................................. 300
19.6 Can I scan a QR code using my phone?.................................................................................................................. 300
19.7 How do I know whether my phone has been rooted? ............................................................................................. 301
19.8 Does automatic time synchronization consume data traffic? .................................................................................. 301
19.9 Can I use my phone for recording? ......................................................................................................................... 301
19.10 Does my phone come with a protective film? ....................................................................................................... 301
19.11 Does my phone support mobile TV? .................................................................................................................... 301
19.12 Can I browse or edit Word, Excel, PowerPoint, and PDF files on my phone? ..................................................... 302
19.13 How are my phone ROM and RAM allocated? .................................................................................................... 302
19.14 When does my phone display the notification panel or switch shortcuts if I flick down on the home screen? .... 302
19.15 How do I turn on the scientific calculator? ........................................................................................................... 302
19.16 Can I quickly move icons to different home screens? .......................................................................................... 302
19.17 Why does the calculator still rotate after I set my phone's screen orientation? ..................................................... 302
19.18 Why can't the icons align with each other after I enable the shake gesture for aligning icons? ............................ 302
19.19 Why do I feel electric leakage or shock when I use the headset? ......................................................................... 303
19.20 How do I use the noise reduction headset? ........................................................................................................... 303
19.21 Why is my headset jack loose? Why can't I fully insert my headset connector into the headset jack on my phone?
Why can I only hear a background tune at a small volume? .......................................................................................... 303
19.22 Does my phone support the three-button line control headset? ............................................................................ 303
19.23 What is the weather information inaccurate? ........................................................................................................ 304
19.24 What can I do when my phone receives no signals? ............................................................................................. 304
19.25 How do I obtain bootloader unlock permissions? ................................................................................................. 304
19.26 What is the safe mode? ......................................................................................................................................... 305
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