Backgammon Y11T installation on the card so no signal to do this

Hello! There are many factors that affect the mobile phone signal

1. The environment is airtight. When you are in an underground shopping mall or a tightly sealed elevator, the information received by the mobile phone is intermittent and unaudible, or the sound is very small and inaudible, because the building or other objects interfere with the information and block it. In particular, many buildings are made of steel, and those who have studied physics know that mesh metal is the best way to shield signals.

2. Region switching. When you make a call cross-zone switch, the call will be dropped if the conditions are not met. For example, if you want to extend the call position from one service cell to another service cell, or connect across several cells, this requires the user to switch the voice channel from the original cell to the new service cell, but because the user of the new service cell is busy and idle, if you happen to encounter the situation that there is no effective voice channel to provide at the time of switching, the cross-zone handover fails, so that the disconnection phenomenon occurs.

3. Radio interference. When there is strong radio wave interference, it often causes disconnection. This is because mobile communication is carried out by the propagation of air waves, if some strong radio waves in the air interfere with the radio waves being used to a certain extent, and the signal noise ratio drops below the standard value, then the mobile phone will automatically turn off, and you will be unable to talk due to the sudden disconnection.

You can try it by changing the environment, location, or SIM card.

Ask the customer service of China Mobile or Unicom.

Hello! Sorry for the inconvenience, we recommend that you try the following methods: Pull down the status bar of the phone and click one-click acceleration (one-click cleanup) or go to the program management of the desktop to close the background program and clear the cache files to increase the available memory and avoid the phone crashing when the memory is insufficient.

Update your system via the "Settings - > General More Settings - > System Upgrades - >Check for Updates Now" upgrade. Try to clear the abnormal data (i.e., restore the factory state) through "Settings -> General More Settings ->Factory Reset->Erase All Data" to solve the crash caused by viruses and third-party software compatibility. Note:

Clearing the data will lose all the data stored on the user's mobile phone, including ** book, short message, third-party application software, related information, and the data stored on the T card will not be lost. Use with caution If the problem cannot be solved by the above methods, please contact the after-sales service center, and the ** address of the after-sales service center can be queried in Settings - General More Settings - After-sales Service. You can also go to vivo official ** to check the address of the after-sales service center.

It is recommended to try the following:

1. Restart the phone and let the phone re-register the network;

2. Take out the SIM card and reinsert it or replace the SIM card to eliminate the SIM card failure;

3. Use 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 it also exists, it may be caused by the poor signal coverage of your local network operator. For example, some tall buildings, basements, parking lots, remote mountainous areas, etc. can affect the mobile phone signal.

If you still can't solve the problem after operating the above methods, please bring the purchase invoice, warranty card and mobile phone to the nearest vivo after-sales service center for testing and processing. The address of the after-sales service center can be found in Settings - More Settings - After-sales Service Options.

Y13L This mobile phone should support the use of Unicom card years to dig.

If you just let go of the card of the wild machine, you can restart the phone first to see if there is a signal...

If it is damaged, you can go to the business hall to change a new card, and then try to use it for a royal test.

It is recommended that you try a different SIM card.

First of all, such as in some tall buildings, basements, tin houses, remote mountainous areas, parking lots, etc., will affect the mobile phone signal, as well as poor local signal coverage will also lead to poor mobile phone signal, and SIM cards may also lead to poor signal. If you rule out the above situation or the signal is poor, you can refer to the following ways to deal with it: 1. It is recommended to restore the digital silver settings to try, enter the phone's settings - more settings - restore factory settings - restore all settings (will not delete any data on your phone).

2. You can prepare a banquet to update the system version to optimize the system: click Settings - More Settings - System Upgrade - Check the update immediately, according to the prompts**Upgrade package, click Verify and Install, the phone will restart and automatically enter the upgrade mode.

3. If the above methods still can't solve the problem of poor mobile phone signal, according to the description of the love machine, it is recommended to send the mobile phone to the local after-sales service center to test the specific reason, and there will be professional and technical personnel to serve you. The address of the after-sales service center can be found in the Rolling Width Settings - More Settings - After-sales Service Options.

There is no phone bill, whether to turn on airplane mode,

1. Check whether the SIM card has enabled the data Internet function, ** The card needs to open the data traffic Internet service before it can use the data network normally, you can contact the local operator to open it.

2. Make sure the "Data Network" switch is turned on, and try to see if you can access the Internet after restarting the phone.

3. Check the signal icon of the status bar at the top of the screen of the hand grinding machine, whether there is a weak signal, unstable signal or no signal, if the signal in your location is not good, it is recommended that you change the network environment to try.

4. Please call the operator to check whether the mobile phone is in arrears.

5. You can install the SIM card to other mobile phones for comparison, if you still can't use the data network, it is recommended to change the SIM card to try, if other mobile phones can be used, it is recommended that you back up the important information of the mobile phone, enter Settings - General More Settings - Restore factory settings - Restore all settings and try again.

If the problem still exists, please bring the purchase invoice, warranty card and mobile phone to the nearest vivo after-sales service center for testing and processing.