Why is the Nubia Z7mini mobile phone card contact suddenly gone

hi！You can try to restore the factory settings, if there is no improvement, it is recommended that you go to the local Nubia after-sales service center, and our after-sales service personnel will test and deal with it for you.

It is also recommended that you use QQ contacts for backup.

This situation may be caused by two situations: 1. Due to the abnormal reading of the mobile phone card; 2. It is due to the abnormality of the third-party address book software installed on the mobile phone.

Solution: Import the contacts of the SIM card to your phone, and then merge the contacts of your phone again.

Operation steps: First try to reseat the phone card, then restart the phone, go to the phone's settings - more wireless connections - the default information app is set to information, and then enter the phone's contacts - more - contacts advanced options, set the default storage to the phone storage, and then import the phone card contacts to the phone, and then merge the duplicate contacts.

If you have installed third-party address book software, it is recommended to uninstall it.

If the system of the mobile phone is an old version, first back up the data of the mobile phone to the computer, and then follow the tutorial to upgrade the system to the latest version to use, detailed rom** and upgrade tutorial: log in to the nubia official website forum - z7max section - rom release can be seen, any questions can be called nubia official website 400** consultation.

The SIM cannot read the card for the following reasons:

1. If the SIM card is not installed correctly, after pulling it out, reinstall it for testing;

2. The gold finger of the SIM card is oxidized, and after the SIM card is removed, clean it with an eraser;

3. If there is a problem with the quality of the SIM card, go to the business hall to replace the SIM card with a new one;

4. There is a problem with the quality of the mobile phone, resulting in the SIM card cannot be detected, contact the after-sales service to detect the mobile phone.

What card? Telecom cards are not supported for use in card 2. First of all, confirm whether the card is damaged, if it is good, try to change someone else's mobile phone card, and try to restore the factory, and then return it.

Nubia Z17mini is a phone that can import contacts.

Here's how:

1.Turn on the phone contacts function and tap the three-dot sign in the upper left corner.

2.Select Contact Settings.

3.You can select the appropriate import method according to your needs.

nubia: Open [Contacts] - click [ [Contact Settings] in the upper right corner - [Import Export Contacts]; Nubia: Open Contacts, click Advanced Options for Contacts in the lower right corner, and you can import and export, merge duplicate contacts, and set the default storage location for contacts.

Nubia Z7mini is a dual-SIM dual-standby all-Netcom mobile phone, which can support China Mobile Unicom Telecom 2G 3G 4G SIM card and network. If the SIM card inserted in the mobile phone cannot be recognized, it is recommended to do the following troubleshooting:

The mobile phone uses a micro SIM card, if your card is a small card cut by yourself, it is recommended to go to the business hall to replace the special micro SIM card for free, the card cut by yourself may not be recognized due to contact problems.

Check your local network coverage to see if your phones are available from other identical carriers, or test them in the city center.

Insert the unrecognized card into another mobile phone to test, or change the SIM card of another mobile phone and insert it into the Z7mini to see if it can be recognized.

If the SIM card can be recognized normally on other mobile phones, it cannot be recognized on this mobile phone. You can go to the local Nubia customer service center for testing and processing.

hi！Hello, if you are using a clipping card, there is a possibility that there may be a recognition problem. You can go to the operator's office to change to a standard microSIM card.

If you still can't recognize it, you can choose to contact the nearest nubia official after-sales customer service center (click on the query address).

Inspect and repair your phone.

Telecom signals are the best now.

Before turning off card 1, is there a signal for card 2?

Restart the phone card and plug it, then restart the phone, and then in the phone's Contacts - More - Contacts Advanced Options, click Export Contacts to ** card, and then place the phone to other brands of mobile phones, and then enter the phone's contacts, export the contacts to the mobile phone to see.

It should be that the SMS system app is out of the question, or you haven't upgraded the latest system. Of course, it could also be that your ** card is out of credit, or there is a problem with what you sent. Troubleshoot the system first, and double clear it.

It may be that the system cache is too much, and it is faulty, you can try it in Shuangqing, and if it doesn't work, you can change your phone.

Here's how to do it:1: Turn off your phone completely.

2: After completely shutting down, press and hold the volume up button + power button, the two keys are only pressed together, don't loosen, after a while, Zhishan posture enters recovery mode, note: In recovery mode, press the volume up and down keys to select, and press the power button to indicate OK.

3: After entering the recovery mode, perform double clearing, whether your phone is the recovery that comes with the system or the recovery of a third party, whether you are in Chinese or English, as long as there is [wipe data factory reset, Chinese is: empty all data factory reset] and [wipe cache partition Chinese is:

Clear the cache]

4: Press the volume button to select [wipe data factory reset] (in Chinese, erase all data, that is, restore factory settings), then press the power button to confirm, and then select [yes - delete all data].

5: Press the volume button to select [wipe cache partition] (in Chinese), then press the power button to confirm, and then select [yes - wipe cache] (yes - clear cache).

6: Then select [Reboot System Now], press the power button to confirm, and then start the phone.

If it doesn't work, then try to change the card.

There are only two situations when the phone has no signal:

1. Network problems or network inability to cover. When the network coverage is not good, it is generally located in mountainous areas, basements, elevators, and when there is shielding or signal interference, there will be no signal or very weak appearance.

In the process of debugging, optimization and maintenance, the network may also cause signal instability, and the general network will return to normal, and the mobile phone signal will return to normal.

2. Problems with the mobile phone itself. There may be a problem with your phone's receiver. You need to go to the repair point to have a look. Of course, the factor of SIM card corruption cannot be ruled out.

There could be several reasons:

1. In the region, the network has been adjusting recently.

2. Maybe there is a problem with the receiver of the mobile phone, sometimes good and sometimes bad.