Problems with mobile phone Bluetooth all to help .

It is estimated that you are buying a copycat, and the knockoff has a great echo, and the original will be a little better.

There is a problem with Bluetooth.

Try another one.

It could be a problem with someone else's phone to confirm.

Summary. Taking Huawei P40 mobile phone and system as an example, the reasons and solutions for the Bluetooth function of the mobile phone cannot be turned on: 1. It may be that the mobile phone system is faulty, resulting in some functions of the mobile phone cannot be used.

Workaround: Try restarting your phone, or back up your phone data to restore your phone to production settings. 2. It may be that the Bluetooth module of the mobile phone is faulty, resulting in the Bluetooth function of the mobile phone cannot be used, for example:

Bumps, water ingress, moisture, etc. Solution: It is recommended to contact the after-sales service of the mobile phone, and then let the professionals check and repair it.

3. It may be that there are some software in the mobile phone that are incompatible with the system, resulting in the Bluetooth function of the mobile phone cannot be used. Solution: Try removing the incompatible software from your phone, and then restart your phone.

4. It may be that the hardware related to the Bluetooth function of the mobile phone has been damaged, resulting in the Bluetooth function of the mobile phone cannot be used. Solution: It is recommended to contact the after-sales service of the mobile phone, and then let the professionals check and repair it.

This answer applies to most models of Huawei smartphones.

Excuse me, but please go into more detail?

Taking Huawei P40 mobile phone and system as an example, the reasons and solutions for the Bluetooth function of the mobile phone cannot be turned on: 1. It may be that the mobile phone system is faulty, resulting in some functions of the mobile phone cannot be used. Workaround:

Try restarting your phone, or back up your phone's data to restore your phone to production settings. 2. It may be that the Bluetooth module of the mobile phone is faulty, resulting in the Bluetooth function of the mobile phone cannot be used, such as: bump, water, moisture, etc.

Solution: It is recommended to contact the after-sales service of the mobile phone, and then let the professionals check and repair it. 3. It may be that there are some software in the mobile phone that are incompatible with the system, resulting in the Bluetooth function of the mobile phone cannot be used.

Solution: Try removing the incompatible software from your phone, and then restart your phone. 4. It may be that the hardware related to the Bluetooth function of the hand-connected machine has been damaged, resulting in the Bluetooth function of the mobile phone cannot be used.

Solution: It is recommended to contact the mobile phone after-sales distress, and then let a professional check and repair. This answer applies to most models of Huawei smartphones.

Second, the specific operation steps: 1. True.

Recognize that Bluetooth is in the power-off state: press and hold the multi-function button for 2-3 seconds, and the Bluetooth indicator red light flashes quickly about 3 times, that is, turn off Bluetooth. 2. Bluetooth in.

into a pair. Status: Press and hold the multi-function button.

In 7-8 seconds, Bluetooth enters the pairing state, which is manifested as:

The indicator light is red and blue.

Alternately flashing rapidly or the indicator light is always on. Three, Bluetooth into it.

After the work enters the pairing state.

Next, enter the operation of the mobile phone: 1. Turn on the Bluetooth function of the mobile phone and search for the Bluetooth model. 2. The mobile phone is connected with Bluetooth, if prompted to enter the PIN code, it is generally 0000 or the pairing is successful. This.

If Bluetooth supports the A2DP protocol, it can also be used to listen.

1. Turn on the Bluetooth headset.

1.Slide the on/off key of the Bluetooth headset up (that is, turn on the Bluetooth headset switch).

2.Turn on the visible mode of the Bluetooth headset (after long pressing and holding the answer button for about 3 5 seconds, the indicator light turns blue and lets go when it is always on, you can turn on the visible mode of the Bluetooth headset).

2. Turn on the Bluetooth function of the mobile phone and connect it.

1.Under the standby screen, tap the Menu button, and then select the Settings option.

2.Slide the [Switch] button to the right to turn on the [Bluetooth] mode.

3.Click the [Bluetooth] option, and you will automatically enter the Bluetooth interface. ‍4.After entering the Bluetooth interface, the Bluetooth headset device will be automatically scanned.

5.Click on the scanned Bluetooth device to connect it automatically (you can check the status after the Bluetooth headset has been successfully connected).

There could be three reasons why Bluetooth doesn't connect: A problem with your mobile device. It is recommended to clear the information of the paired device, then scan the device, find the device to connect and connect, there will be verification during the period, just follow the prompts.

If you want to use a Bluetooth device connected to your mobile phone, it is recommended to check whether the battery is sufficient, restart it, and try again. If that doesn't work, you can do a factory reset. Different devices have different factory recovery operation methods, you can refer to the manual or consult customer service.

There is interference from Bluetooth devices around, it is recommended to try another location separately.

First of all, the first point, we must confirm in advance that this device does not support the platform you are using, the pen-teller found that almost 60% of the phenomenon of not being able to connect is because the devices do not support docking at all, so before we use and buy Bluetooth devices, it is best to confirm the platform that the device can support, such as: macOS, iOS, Android, Win, ......etc

Second, we should check whether the bridge power of the device is sufficient before connecting? Because Bluetooth is a weak current device, the sensitivity to voltage is much higher than that of mobile phones. Therefore, in the case of insufficient power supply, it is easy to have some connection difficulties.

Third, in addition to the above situations, the Bluetooth version and the system's own version problems will also lead to the situation that the connection cannot be reached. For example, if you buy a Bluetooth headset and only support Android and iOS 11, then your Minyouliang device must have at least two of the above three conditions to connect normally.

The use of Bluetooth technology can effectively simplify the communication between mobile communication terminal devices and between devices and the Internet, so that data transmission becomes faster and more efficient, and the road of wireless communication is broadened.

2. Security issues: Bluetooth security also needs to be improved. The first Bluetooth requires the user to verify the PIN code.

The PIN code generally consists of only numbers, and the number of digits is very small, generally 4-6 digits. After the PIN code is generated, the device will automatically use the E2 or E3 encryption algorithm brought by Bluetooth to encrypt the PIN code, and then send the PIN code for identity authentication. In this process, hackers are likely to crack passwords by intercepting packets, masquerading as the target device of a Bluetooth connection, or using a "brute force attack."

The mobile phone is connected to the Bluetooth problem, this is normal, but the signal is not good.