Why does Lenovo A678T have data connection not available

Dear Lenovo mobile phone users, hello!

Sorry for the inconvenience caused to the normal use of your mobile phone.

The problem that the mobile phone cannot move data to access the Internet may involve whether the SIM card is in arrears, the mobile data service switch, the access point, and the system is abnormal.

According to the description, if the data connection switch is turned on, it is recommended that you try to confirm and operate the following:

1. Is it due to arrears or abnormalities of the SIM card of the mobile phone?

Try dialing ** to see if the call works. In addition, if you have just paid the phone bill after the shutdown due to arrears, you need to restart the mobile phone before you can access the Internet normally, please understand.

Or you try to change to a different SIM card for testing.

2. Is it caused by the current poor network signal?

Are you sure that other mobile phones can access the Internet normally? Or compare yourself to other users around you.

3. Is it caused by an abnormal access point?

Or check the settings again, you can refer to this for specific settings.

4. At the same time, do you also make sure that you have operated some traffic monitoring settings?

For example, Lenovo's Le's security - traffic monitoring - application network management operation related, or others such as 360 mobile phone guard, etc.

5. If you used it normally before, you can try to back up the important data of the fuselage, and then restore the factory settings of the phone to see if it can be improved. (Operational under System Settings - Backup & Reset).

6. If the system is abnormal due to the fact that you have flashed the third-party firmware or root to obtain permission, etc., you need to re-flash the system to restore the use of the system.

Since we can't see the specific situation of your phone remotely, if the problem persists and cannot be effectively solved, we recommend that you take the time to go to your local Lenovo service center and let the engineer help restore the system or detect and solve it. You can log in to the official website to check the address.

I hope the above reply is helpful to you and I wish you a happy life!

Make sure that the data feature is enabled on the mobile phone.

Check whether the phone is in arrears.

Restart your phone and try again.

Is the signal good? Just reboot. Turn off the data, restart the data, and the data will definitely be fine.

There should be a bad signal, you can try it with a mobile 3G card.

Let's see if the password is correct;

Shutdown and restart; Restart the router;

change routes or access points;

Back up your phone data, factory reset; Send it for repair.

We apologize for any inconvenience this may cause and affect your use.

If you have other wireless networks nearby, please try to compare:

a. Other networks can be connected normally, you can judge that the mobile phone system and hardware function are normal, please try as follows:

1. Password correctness: In most cases, it is caused by the failure of password verification, it is recommended that you try to confirm whether it is caused by the wrong wireless password input, you can verify it by modifying the encryption method or canceling the encryption;

2. Wireless network signal: When the wireless signal signal is weak, it may lead to the inability to connect normally or the application cannot be connected to the network normally, it is recommended to move the mobile device to the wireless network signal is strong to try;

3. Abnormal wireless network parameters: In order to avoid abnormal connection due to abnormal wireless network parameters such as DNS, it is recommended that you try to set the wireless network as a static IP assignment, and the static IP setting menu of the product is as follows: System Settings - WLAN - Advanced - IP address, please refer to it.

4. If the above suggestions still cannot be improved, it is not excluded that the compatibility between the routing equipment and the product is caused, and it is recommended that you replace the wireless network or routing equipment for use;

b. If other networks cannot be connected normally, it may be caused by abnormal system or hardware functions

1. Please back up the fuselage data and try to restore factory settings;

2. If it still cannot be improved after recovery, please take the time to go to the local maintenance site to test and process the system and hardware.

If the conditions are limited and you cannot compare with other wireless networks, it is recommended that you conduct a simple investigation based on the above suggestions, and if it cannot be improved, please send it to the repair site in time.

Lenovo Authorized Repair Site Query:

Press and hold the sound plus or minus keys at the same time when powered on.

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Lenovo Community.

You are welcome to contact us at any time or visit Lenovo Lewen (for consultation.

Hello,This is related to the signal of your location,Maybe the signal is weak,Or in the peak period of Internet access,LenovoA789It belongs to the Unicom version of the customized machine,Support Unicom3G network,If you use a mobile card,The network card is normal,It is recommended that you use a Unicom card,Use3G network speed60KB2,If yours is already a Unicom card,Must be placed in the card1 to support3G Oh。 The signal symbol of 3G is H or 3G, I hope it can help you.