The vivo X9 has a really bad signal, why

The reason for the bad signal is that the signal will be affected by various factors such as terrain, landform, and high-rise buildings in the process of propagation

1. Turn the phone on and off again;

2. Swap the SIM card to a family member's or friend's phone and try again;

3. Check whether there is a signal from other Unicom users around;

If the above situation has not been resolved, it is recommended to contact the manual customer service of the place where you belong for processing.

Overall, the VivoX9 has a good signal. The signal performance of vivoX9 maintains a high-speed signal of 4G+ in a daily environment. And the sensitivity of the signal is highly responsive.

If there is a signal problem, you can check whether it is a network failure or an environmental problem.

1. The basic signal configuration of vivoX9.

The signal of vivoX9 is to support 15 modes and 21 band full Netcom, full 4G+ mobile phones, provide global network support, support mobile, telecom, Unicom full standard, support all three major operators 4G+ network.

In terms of signal design, it can be seen that the back of vivoX9 adopts a dome-type U-shaped design, and the antenna is designed in the way of a U-shaped track. This design is the mainstream of mobile phone design, compared with segmented and micro-slit antennas, this design not only makes the metal behind the mobile phone more integrated, but also greatly improves the signal receiving area of the antenna belt.

2. Reasons that may lead to poor mobile phone signal.

1.The geographical environment is relatively closed.

2.Electromagnetic wave signal blocking.

3.Network congestion, failure, etc.

3. Ways to restore mobile phone signal.

1. Shut down and restart to try it;

2. Take out the SIM card and reinsert it or replace it with another SIM card.

3. Use it after changing the network environment and time period, and you can also compare other mobile phones (using the same network) to see if this phenomenon exists.

If the signal of vivo X9 is poor, you can refer to the following methods:

See if you are in a basement with a bad signal, or a crowded place, resulting in a poor signal;

There are too many software to check whether the phone is open, which occupies the running memory, resulting in poor signal;

If not, it may be a quality problem with the mobile phone, refer to the next three guarantees to negotiate with the merchant to exchange.

Some of the regulations in the Three Guarantees Law are available for your reference:

Within 7 days from the date of sale, if the function listed in the manual fails, the screen is not displayed, the typo is missing, the phone cannot be turned on, the normal login or communication cannot be made, there is no ringing, dialing error, abnormal shutdown, SIM card contact is poor, the key control fails, there is no sound, one-way silence or the volume is abnormal, the shell is cracked due to structural or material factors and other performance failures, the consumer can choose to return, exchange or repair;

When the consumer requests to replace the goods, the seller shall replace the mobile machine of the same model and specification for the consumer free of charge, and when the consumer requests to return the goods, the seller shall be responsible for returning the goods for the consumer free of charge, and refund the payment according to the invoice **;

From the 8th to the 15th day from the date of sale, if the mobile ** machine has the performance failure listed above, the consumer can choose to replace or repair it. When the consumer requests to exchange the goods, the seller shall replace the mobile machine host of the same model and specification for the consumer free of charge;

During the validity period of the three guarantees, if the host of the mobile machine has the performance failure listed above, and it is still not able to be used normally after two repairs, the seller shall be responsible for replacing the mobile machine host of the same model and specification for consumers free of charge with the repair record provided by the repairer in the three guarantees certificate;

During the validity period of the three guarantees, if the battery, charger, mobile terminal card, external wired headset, data interface card and other mobile accessories have performance failures, the seller shall replace the accessories of the same brand, model and specification for consumers free of charge. If it is still not used normally after two replacements, the seller shall be responsible for returning the goods for the consumer free of charge, and if it is sold separately, the payment shall be refunded at one time according to the invoice; If it is sold together with the host, the payment will be refunded according to the ** sold separately at the time of return.

1. Change the network environment: the mobile phone is in some tall buildings, basements, parking lots, etc., which will affect the signal; If you are in a closed place (e.g., an elevator) or in a remote area, it is easier to disconnect your phone from the outside world.

2. Re-register the network: You can restart the mobile phone to let the mobile phone re-register the network.

3. Determine whether the SIM card is valid: If the SIM card is not installed properly, or the SIM card is damaged, the signal will inevitably be affected. You can remove the SIM card and reinstall it, or try a different SIM card.

4. Operator network problems: If the signal of the mobile phone suddenly deteriorates within a certain period of time, it may be a network problem of the operator. It is recommended to compare mobile phones with the same carrier SIM card in the same environment to see if there is the same situation, and you can try it at another time period.

5. Whether to use a metal protective case: The metal protective case will have a certain impact on the mobile phone signal. It is recommended to remove the metal case, replace the factory mobile phone case to protect the phone, and then observe and use it.

If you have dismantled your mobile phone, it is recommended to go to the vivo after-sales service center to deal with it. The address of vivo after-sales service center can be queried by entering the mobile phone settings - more settings - service outlets and selecting the province and city where it is located.

Note: You can call ** first to confirm the after-sales working hours and plan the itinerary reasonably.

1. Reasons for poor network quality.

If the same phenomenon occurs in the vicinity of mobile phones using the same carrier card, it may be caused by poor network quality in the current location.

2. Check your phone settings.

Open your phone's shortcut bar (scroll up at the top or up at the bottom) to see if data is turned on.

3. Confirm the status of the mobile phone card.

Please make sure that the balance of the mobile phone card is sufficient, if the payment is in arrears, please restart the mobile phone after the recharge is successful. Check with your carrier to see if the data** has reached the data limit. If necessary, you can change the SIM card that can access the Internet normally to confirm.

4. Check the mobile phone signal.

If your phone uses a metal, magnetic case or bracket that has an impact on your phone's signal, we recommend that you remove it and try it.

5. Check the network settings.

Please go to Mobile Settings - Mobile Network Dual SIM and Mobile Network - Mobile Unicom Telecom Radio and Television - Access Point (APN) and click here"Reset to the default settings"restart your phone.

6. Reset the network settings, the operation will delete and disconnect the connection and pairing records of WLAN, mobile data network, Bluetooth and other networks, and enter Settings - System Management - Backup and Reset - Reset Network Settings - Enter the lock screen password.

7. You can enter the Settings - System Management - Backup & Reset - Restore All Settings - Restore and Restore Settings option. This operation will not delete the ** file, it will cancel the password, restore all settings, including: set wallpaper, unlock style, wifi, default open program, etc., and the logged in software account also needs to be logged in again.

Note: Go to Cloud Service - Device Cloud Backup - Backup Data Type - System Data - Return - Back to Back Up Now to back up some system settings and desktop layout; Cloud service--Data synchronization--Turn on WLAN, Bluetooth, etc. to synchronize data to cloud service.

If you are currently using a vivo mobile phone with poor mobile phone signal, you can troubleshoot it as follows:

1. Please check whether you use metal protective shell, magnetic protective shell, magnetic bracket and other accessories, metal and magnetic materials are easy to interfere with signal reception, it is recommended that you remove the accessories to view.

2. If you are in a closed indoor environment (such as: basement, elevator, etc.), the mobile phone signal may be blocked, resulting in poor signal, you can go to the outdoor environment to check. If you are in a remote area and the signal may be poor, you can determine whether it is the cause of network coverage by using the mobile phone signal of the same operator's network in the vicinity.

3. Observe whether there is dirt or oxidation on the metal surface of the SIM card, and check it after cleaning. If you use a tailor-made SIM card, it is recommended to replace it with a standard SIM card. Install the SIM card to another device, or install another SIM card to your mobile phone for comparison and testing to determine whether it is a SIM card failure.

If it is a SIM card reason, it is recommended that you go to the operator's office to replace the card.

4. Go to Settings - System Management - Backup and Reset - Reset Network Settings - Select the corresponding SIM card - Reset settings, and then use to view. (Some models support this path).

Note: Resetting the network settings will delete and disconnect the connection and pairing records of WLAN, mobile data network, Bluetooth and other networks, it is recommended to back up the wifi and password and other data before the operation, you can enter the mobile phone cloud service - device cloud backup - backup data type - turn on system data.

5. If you can't see the "Reset Network Settings" option, you can go to Settings - System Management - Backup & Reset - Restore all settings, and follow the on-screen prompts.

Note: Restoring all settings will not delete any data or files, it will restore all settings of the phone, and some third-party application accounts need to be re-logged in, please confirm that it does not affect the use of some of your third-party software before operating. (Before this operation, it is recommended to back up the important data in the mobile phone to avoid loss and irretrieval of it).

6. If the above methods fail to solve your problem, please back up your mobile phone data in advance, and bring your mobile phone and purchase voucher to vivo customer service center for testing. (Service center address: You can get it by entering the vivo official website vivo**app--my-after-sales outlets or clicking to select your current city.)

Tips: It is recommended to bring relevant purchase vouchers (such as: purchase invoices, warranty cards, etc.) when you go, and consult the staff of the consultation center in advance to ensure that the staff go there during normal working hours, avoid running empty, and pay attention to safety on the way to and from the service.

Summary. <>

Dear, I'm glad to answer for you: a bad external network environment or a system problem with the mobile phone itself may cause poor mobile phone signal.

What's wrong with the poor signal of vivo mobile phones?

Dear, I'm glad to answer for you: a bad external network environment or a system problem with the mobile phone itself may cause poor mobile phone signal.

1. Check the mobile phone signal sign, if the signal is weak, try to get out of the weak signal area to a relatively wide area to call**. 2. To turn on the airplane mode, you can try to turn on the airplane mode, turn on the airplane mode of the mobile phone for 5-10 seconds, and then turn it off. In this way, the hand rubber machine can search for the signal again.

3. You can walk around to improve the quality of signal reception. 4. Pick up the call in the normal network environment, avoid the bustling business district, the beam selling oak room during the peak, bad weather, and stay away from the electromagnetic interference zone. 5. The metal protective case will affect the signal reception of the mobile phone, if the mobile phone uses a metal protective case, remove the protective case and try.

After the above methods fail to solve the signal problem, there may be a system problem, as well as a mobile phone motherboard problem, it is recommended to go to the after-sales service, or the mobile phone repair flash, as well as replace the signal cable. When this does not roll the core, you can try the method of brushing the backup bending machine to restore the system.

1. Turn on airplane mode.

When you find that the mobile phone signal is not good, you can try to turn on the airplane mode, after the airplane mode is turned on, you can wait for a while and then turn it off, after turning off the airplane mode, the phone will automatically start to search for the signal and connect, so that the mobile phone signal can return to normal.

2. Restart your phone.

In addition, you can also restart the phone to restore the mobile phone signal, restarting the phone is also a good way, generally after restarting the phone, the signal logo will reappear, so that you can also re-search and get a stable signal. This method is also suitable for use on computers

3. Change the network mode.

In addition to this, you can also restore the enhanced phone signal by changing the network mode, now many people will set the network mode to 4G mode, so you can try to change the 4G mode to 5G mode, because 5G mode is more stable than 4G mode, so you can try to change it to see if the phone signal is improved.

3. Enter the mobile network interface and click on the access point on the page. 4. Click the Add Access Point option on the Access Point page. 5. Go to the new access point page and click the name on the page.

6. Enter cmtds in the name box, capitalized. 7. Click on APN and enter cmtds in the box, which should be lowercase. 8. Click Done in the upper right corner.

This depends on the signal or the mobile phone.

Let's change my phone, so do I.

First determine your environment, whether the signal itself is poor, and see how the mobile phone signals of friends and colleagues are good.

If it is not the case above, then:

1. The use of data network speed is slow and the signal is poor.

Restart your phone; Shelter the rock to replace the ** card try;

Go to mobile phone settings - mobile network - access point - change access point to try;

Replace the stable network environment or change the time period (avoid being in a closed room, surrounded by tall buildings, poor network signal coverage, etc.), or connect to wifi if conditions permit;

Go to iButler - Traffic Monitoring - Network Management to see if the software uses the data network.

2. Use the wifi network with slow network speed and poor signal.

If it is your own WiFi, you can restart the router to try; If it is a public WiFi, you can try to change it to another WiFi;

The number of users around, different time periods, and distance from the wifi transmitter source will also have an impact on the wifi network speed, you can try to change the time period.