The call quality of Xiaomi Mi III is poor after upgrading the beta version! How to solve the problem

Hi! Try it out three times.

It's best to open the backup software that comes with your phone to back it up before clearing it to facilitate recovery.

Sanqing is to format the phone, which can solve most of the system problems, software flashbacks and other abnormalities, and Sanqing is also used to update the system before.

Clear the system data to ensure that the flashing can be carried out normally.

The method of entering the REC mode and clearing the three clears.

1. Open the system update software on your phone, menu key, and select to enter REC mode.

2. In the shutdown state (deduct the battery by yourself), press and hold the power button and the volume plus button together, and let go after lighting up the screen later.

Then go to a page, Chinese Simplified.

english

3, The power button is the OK key, the volume up and down keys are selected, there are three options in the page, press the power button to OK, select Chinese Simplified.

4. Select Clear Data.

5. Select Clear Cache, and when the clearing is complete, select Clear Data again.

6. Select Clear User Data, and after the clearing is complete, select Clear Data again.

7. Select Erase All Data, and when the clearing is complete, select Restart the phone.

8. Select Enter the system with Recent.

9. After the phone is turned on, find it, back it up, turn it on, and restore all the data.

It is possible that the motherboard is damaged by flashing.

The call is quiet, and it may be noise-canceled.

Dual-microphone noise reduction technology is currently the most widely used noise reduction technology, one microphone is used by ordinary users when talking to collect human voices, and the other is configured on the top of the fuselage, with background noise collection function, convenient for collecting surrounding environmental noise. In this way, when the user is talking, the microphone at the top collects the noisy background sound, and then compares it with the background noise information database after a series of hardware accurate filtering and enhanced real-time signal operation processing, and then superimposes it on the original call signal according to the principle of signal cancellation to achieve the effect of eliminating noise and improving the quality of the call. At the same time, this technology can not only effectively improve the call quality in a noisy environment, but also reduce the volume appropriately in a quiet environment to avoid the leakage of call content.

At present, the latest MIUI development version system already supports turning off dual-microphone noise cancellation.

In Settings - Sound & Vibration - Call Noise Cancellation! Count to change the settings!

If this is not the reason, it is recommended to send it for repair!

Hi Mi Home is open from Tuesday to Sunday, from 10 a.m. to 6 p.m. During the warranty period, non-man-made damage is completely free of charge.

If there are no outlets near you, please go to Xiaomi's official website.

This depends on what the sound is, generally speaking, there are the following two situations:

First, the sound of cannon fighting:

1. There is a discharge phenomenon (cleaning and drying) on the machine board.

2. Tail plug leakage (cleaning, drying).

3. The paper tray of the receiver is damaged or of poor quality.

4. Short circuit and leakage of flexible cable.

5. False welding and leakage of audio peripheral components.

Second, the sound of communication:

1. Leakage (rewelding) at both poles of the microphone.

2. Caused by replacing the poor quality casing (replacing the *** casing, or shielding with tin foil, but pay attention to it).

3. The transmitting power is too strong (add resistance to the transmission signal sampling line to reduce the power amplifier power).

Hi! It is recommended that you use a cable brush to upgrade to the latest version of the development version, and do not get root access for the time being, and do not install system security software. Try to see if you can fix it. The following flashing tutorial can be referred to.

b.During this time, please back up your data, enter recovery (shut down, press and hold the volume on + boot caution key to enter recovery) to clear the cache, clear user data, clear all data,。 The computer is equipped with a driver,** Miflash flash tool,This is the link to install the driver:

m 1. Mi-2 series.

c.After everything is ready, please follow the brush tutorial on the official website to use the sixth line brush, which is the official brush tutorial:

Hi! Hello, I suggest you can try the following methods to see:

Click Settings - Applications - All - Find the software - Clear Data, clear the software data and then open it.

If all the software is slow to open or has problems opening, you can back up and empty the cache and user data in Recovery. Method: In the shutdown state, first press and hold the "Volume Up Button" and then the "Power Button", and let go when the boot screen appears to enter recovery.

Select Chinese Simplified >> Clear Data >> Clear Cache + Clear User Data. Tips: The touch screen is temporarily invalid in the recovery state, use the "Power button" to confirm, and the "Volume button" to select.

If after the above methods, the corresponding programs are faulty, and other software programs are normal, you can judge that the program is not compatible with the system, you can try to change other versions of the program or game to try.

It is recommended that you try to back up and re-wire your system version after flashing it.

Hi! If you have backed up your data before, or there is no data in your phone that needs to be backed up, it is recommended that you try to enter recovery (turn off, press and hold the volume up + power on button to enter recovery mode) to clear all data, do not restore data for the time being after booting, see if it can solve the problem, if it still can't be solved, it is recommended that you try to brush the line to the latest development version.

Please flash according to the flashing tutorial, and the sixth way is line brushing:

Hi! Please adjust the volume in System Settings - Sound and Vibration, secondly, you pay attention during the call, do not block the bottom of the phone and the MIC near the back flash, if there is still a problem, you can back up the cable to flash your system version, or go to Xiaomi's repair point for after-sales testing.

Because Xiaomi phones have a unique noise-canceling mode, if you are in a noisy environment, the other party will be able to hear you clearly. This noise-cancelling feature implies that you stay as close to the main microphone as possible when you are on a call, otherwise your voice may be "noise-canceled".

Or please open Settings All Settings Sound & Vibration Call Noise Cancellation Select Single Microphone Noise Reduction, and the state retarding attempt is normal.

If the above does not work, please re-update the backup cable and flash your system version.

In the meantime, you can use the following steps to troubleshoot:

1. If the uplink sound of the Mi2 mobile phone is small (that is, the voice heard by the other party is small) or the main microphone needs to be very close to the mouth of the other party to hear, you can check according to the following methods:

1.Use your hand to block the sub-mic hole on the right side of the camera to test,If the sound of the sub-mic call is normal,It is recommended to go to the local Xiaomi home for testing。

2.If the call recording function is enabled during a call and there is no problem with the uplink voice in the recording, it can be preliminarily judged to be a network problem.

Second, if the two parties are talking at the same time or the other party is in a noisy ring which oak realm causes the call to be discontinuous, you can first remove the mobile phone protective case and then call the test, if there is no protective case, remove the back cover and then test, if the call is normal after this operation, it may be caused by the use of non-Xiaomi protective shell, if you do not use the protective case, please go to the local Xiaomi home to test it.

Through the above methods to preliminarily detect and judge, you can quickly locate the problem, and know how to deal with it, so as to avoid affecting daily use. The engineers of the MIUI development team will continue to optimize these issues accordingly to improve the user experience.