Redmi Note 9 FAQ
1．Q：What are the features of Redmi Note 9？
A：Redmi Note 9 has a 3D four-curved body + water wave texture, a 5020mAh large rechargeable battery with a maximum support of 18W quick charging and 9W cable reverse charging, 48 million AI camera, wireless FM radio, can listen to news, music, storytelling without headphones; The hardware is equipped with MTK Helio G85 eight-core processor, 6.53-inch eye-protection screen, and resolution is 2340x1080 FHD +,19.5：9 ratio to bring a cinematic visual experience.
Appearance
1．Q：What are the features of Redmi Note 9 body, and what material does it use？
A：Redmi Note 9 uses a 6.53 -inch LCD full screen; Screen glass material is the fifth Corning protection glass, the back of the body uses the integration of 3D four surface design, at the same time also much lighter than the metal shell of mobile phone back; the gray, white, green colors support to choose.
A：Redmi Note 9 has no touch button and uses a virtual button scheme.
Setting path: Setting >> Full screen >> Classic navigation key
A：Redmi Note 9 doesn’t have a LED Indicator.
A：As shown:
A：Redmi Note 9 supports 3.5mm headphones.
A: The face unlock of Redmi Note 9 can achieve fast and safe face unlock through high-precision intelligent matching through face detection, attitude estimation, quality assessment, feature extraction, face comparison, in vivo detection and other technologies.
Risk tip: Face recognition is less secure than graphic, digital and hybrid passwords, and the phone could be unlocked by photos,or those who with similar looks or objects with similar features.
A: The Redmi Note 9's face unlock needs to wake up the screen after use. It can be used with the function of lifting and awakening to realize the smooth experience of lifting and unlocking the phone. It is recommended to select Settings>> Display>>"wake up" function.
A: The Redmi Note 9 adopts an integrated body design, and the rear cover and battery are not self-disassembly and replacement.
A: Redmi Note 9 has complete machine P2i coating of IP53 technology, which supports life waterproof and splashproof. Damages caused by invading liquid or dust are not covered by the warranty. In addition, life dustproof spillage function will be reduced due to daily wear and tear, not permanent effective. Do not charge mobile phone in wet condition.
Hardware related
1.Q: What processor does Redmi Note 9 use and what is its performance?
A: Redmi Note 9 is equipped with MTK Helio G85 eight-core processor, the highest master frequency is 2.0 GHz, with MIUI 11 system-level customized optimization.
A: Redmi Note 9 uses a 1300 pixel camera with AI portrait mode in the front, and AI beautification, short film shooting, can make shooting more attractive and can be customized according to personal preferences.
A: The Redmi Note 9 rear camera adopts 48 million cameras, which are set to 48MP + 8MP + 2MP + 2MP, with AI scene detection function, intelligent ultra wide Angle mode and stable hand-held night photography bring a wonderful experience.
A: It supports.
A: New features: When adding intelligent rear wide Angle recommendation (identifying buildings, group photos, towers and statues), toast pops up: "it is recommended to open 0.6x ultra-wide Angle mode", and color optimization is performed based on the tuning method of the scene.
A: Redmi Note 9 uses a 19.5：9 ratio screen (resolution is 1080x2340).At present, most apps on the market can automatically recognize the size and resolution of the phone's screen, so that the full screen can be displayed on the screen.A small number of software or play video may not be full screen, not full screen software can be in the full screen Settings can force full screen, no black edge.
Note: if the current frequently used App of abnormal display and screen proportion is out of balance, it can be supported to use
Submits feedback in the desktop >> system tools folder >> user feedback App, and the module selects more >> third party
Application >> to select the corresponding application name, and detailed description of the problem of the App name, we will contact as soon as possible App developers make adaptation updates.
A: Redmi Note 9 uses a 6.53-inch LCD eye-protection screen with a resolution of 1080(H)*2340(V) and a screen ratio of 19.5:9.Support for sun screen, night screen, eye protection mode.
A: Redmi Note 9 adopts Nano SIM card +Nano SIM card +Micro SD card slot design.
Note 1: it is not recommended to cut the card by themselves, which may cause damage to the card holder, fail to recognize the card or SIM card cannot be taken out, etc.
Note 2: it is recommended to purchase Micro SD cards through regular channels.
A: Redmi Note 9 supports dual sim cards and dual standby (single pass). Dual sim cards do not distinguish between primary and secondary cards.
Note: The local carrier's network determines whether to support 4G.
10.Q: Does Redmi Note 9 support VoLTE?
A: Redmi Note 9 supports VoLTE (HD voice and video calling);Use this feature to make the call faster， better call quality;It needs SIM card operator to support， and the region has VoLTE network signal coverage.
11.Q: What is the capacity of the Redmi Note 9 battery?
A: Redmi Note 9 battery capacity is 5020mAh large capacity.
* The actual situation may vary with usage scenarios and software versions.
12.Q: What data interface does Redmi Note 9 use?
A: Redmi Note 9 uses a Type-C USB reversible connector port.
13.Q: Does Redmi Note 9 support quick charging? What is the standard of the adapter?
A: Redmi Note 9 supports QC3.0 ，charges up to 18W.
14.Q: Does Redmi Note 9 support OTG?
A: Redmi Note 9 supports OTG function and can also connect to keyboard， mouse， etc. It is necessary to purchase Type-C interface OTG line for use.If the OTG cable of Micro USB interface is used to connect the phone with Micro USB to type-c adapter， it will not be recognized.
15.Q: Does Redmi Note 9 support NFC (near field communication)?
A:Subject to sales channel parameter.
16.Q: Does Redmi Note 9 support WiFi in 5GHz band?
A: Redmi Note 9 supports WiFi in 2.4Ghz and 5Ghz band， which can meet the needs of most users for WiFi surfing.
Note: Redmi Note 9 cannot open the phone hotspot while connecting to WiFi.
17.Q: Does Redmi Note 9 support 5G?
A: 5G is not supported.
18.Q: What is the bluetooth version of Redmi Note 9? Does it support bluetooth HID?
A: Redmi Note 9 uses bluetooth version BT5.0， supports bluetooth HID， and can connect to external devices such as bluetooth mouse and bluetooth keyboard.
19.Q: Does Redmi Note 9 support radio (FM) function?
A: Redmi Note 9 supports a wireless radio (FM) function. It can listen to radio without the headphone， and can listen to regular FM radio programs， It covers all frequencies from 87-108mhz.
20.Q: What does the Redmi Note 9 standard?
A: Redmi Note 9 standard equipment includes: mobile phone host， power adapter，protective casing， USB Type-C data cable， three packets of credentials， guide， pin.
System related
1.Q: Which version of MIUI is the built-in system of Redmi Note 9? Which version is customized based on Android?
A: The first batch of Redmi Note 9 shipped with MIUI 11 stable version of the system， based on Android 10 in-depth customization.
2.Q: Does Redmi Note 9 support high volume mode?
A: Redmi Note 9 supports the high-volume mode. After adjusting the call volume to full， press the volume + button upward to enable the high-volume mode.By optimizing the software with the underlying hardware， the volume of the receiver can be increased again.At the same time， Redmi Note 9S supports external amplifying volume， which greatly improves the external playback volume and sound quality of the phone.
3.Q: Does Redmi Note 9 support big MAC fonts?
A: Redmi Note 9 supports big MAC font， which makes reading large characters easier and more convenient for the elderly.
Open path: System Settings >> Display >> Font size >> select "big MAC".
4.Q: What is Dark Mode?
A: Redmi Note 9 supports dark mode.The interface of the system and some applications is mainly black， which can reduce the discomfort of using the phone at night.
Note 1: Some screen display functions will be affected when the dark mode is turned on;At the same time， because some third-party apps have not adapted to the dark mode， there may be an abnormal situation on the display.If the relevant display is abnormal after opening， it will return to normal after closing the dark color mode. Users can also submit feedback through the user feedback App to help us better complete and optimize.
Note 2: Turn on the cell phone Settings - display， turn on the "dark mode" switch to enable the dark mode.
Note 3: At present， the dark mode does not support automatic switching according to time and remaining power.
5.Q: Does Redmi Note 9 support split screen mode?
A: Redmi Note 9 supports split screen mode.
6.Q: Does Redmi Note 9 support minimalist mode?
A: Redmi Note 9 is not pre-installed with the "minimalist mode" function. If you need to use it， you can download and install the "minimalist desktop" App from the Mi App store to realize the minimalist mode function.
7.Q: Does Redmi Note 9 support full-screen gestures?
A: Redmi Note 9 supports full-screen gestures， which you can select directly at the first boot or switch in the full-screen options set by the system after entering the system.
8.Q: Does Redmi Note 9 support one-handed mode?
A: Redmi Note 9 supports one hand mode， open method: Setting >> More setting >> One hand mode， you can choose to use different sizes.
After opening， enter one-hand mode:
1. To enter the left hand one-hand mode， you need to quickly slide from the "desktop key" to the "left function key";
2. To enter the one-handed mode with your right hand， you need to quickly slide from the "desktop key" to the "right function key".
9.Q: Does Redmi Note 9 support double click to wake up?
A: Redmi Note 9 supports double click on the screen to wake up (the system is turned off by default)， which needs to be turned on manually.
Open double-click wake-up setting path: system setting >> shows >> double-click wake-up， as shown in the following figure.
10.Q: How does Redmi Note 9 perform hardware detection?
A: There are two ways of hardware detection for Redmi Note 9:
Method 1: enter "*#*#64663#*#*" in the dial interface， or enter "*#*#6484#*#*".
Mode 2: in the Setting>>My device>>All parameters， click "kernel version" four times.
11.Q: Does Redmi Note 9 have Bootloader lock?
A: In order to improve the security of user data， ensure the reliability of phone search function， and prevent scalpers from batch swiping third-party ROM， which may lead to user information leakage or other system problems， Redmi Note 9S has added Bootloader lock.
12. Q: Does Redmi Note 9 support the Recovery mode to empty data?
A: Redmi Note 9 supports the Recovery mode to clear all data.Enter the Recovery mode: in the shutdown state， hold down the volume + power button， and release the power button until entering the Recovery mode after MILogo appears on the screen.
Does it help?