Dual SIM Dual Standby but Unknown when a call comes in

Is there a caller ID function?

Hello! Whether everyone is filial piety to socks and you call** will show an unknown call, you see if the other party is using the network ** dial draft to call!

The caller ID service is opened 201001 SMS to 10086, and the cancellation of SMS 201002 sent to January. Both activation and cancellation will take effect immediately, and the monthly fee for the month of cancellation will be charged normally. . . The caller ID business is that when someone else calls**, the mobile phone will automatically display the other party's **number.

Caller ID service is a kind of service that can automatically enter the number and display it on the display screen of the machine, and can know the caller's number in advance.

Hello, may I ask if some **show unknown, or all ** are unknown?

If it is an individual, it may be that the other party is using the network**;

If this is the case, whether card 2 has activated the caller ID function, you can consult the operator.

If you have any other questions, you can enter the OPPO enterprise platform to ask customer service questions!

The caller ID is displayed as an unknown number, we recommend that you perform the following troubleshooting:

1. If the caller ID function is not enabled on the mobile phone, it is recommended that you contact the operator to consult the activation and related charges.

2. If the attribution of the mobile phone number expires, please update the attribution of the number to the latest version.

3. Go to Settings >Apps & Notifications) > App Management > Dialing, delete data and clear the cache (if you can't find it, click Show System Apps in the lower right menu).

If you want to troubleshoot the above issues, we recommend that you try to restore the factory settings after backing up your data, or upgrade to the latest system version after backing up your data. Here's how to do a factory reset

EMUI version: Please open the "Settings" of your phone, touch "System" "Reset" "Factory Reset", check "Format internal storage", and click "Reset phone".

EMUI version: Please open your phone's "Settings" > Advanced Settings > > Backup & Reset > Factory Reset", tick "Format internal storage", and tap "Reset Phone".

EMUI version: Tap "Settings > Advanced Settings > Backup & Reset > Personal Data > Factory Reset > Reset Phone".

EMUI version: Tap "Settings > Backup & Reset > Personal Data > Factory Reset > Reset Phone".

The phone will automatically restart after the factory reset, please do not do the keystrokes and other operations, please wait patiently for a while.

If the problem persists, we recommend that you back up your data and bring the purchase receipt to the Huawei Customer Service Center for inspection and repair. (2) You can check the service center address on Huawei's official website.

It is possible that there is no caller ID package, it is recommended to consult the number operator (China Unicom 10010, China Mobile 10086).

I haven't turned on the caller ID function.

You can try to click on the system settings, click on the SIM card management, click on the vertical destruction, click on the 1 card or the 2 card of Hu Xianshen, click on the SIM card name, and replace the four words of China Mobile with 1 card, or 2 cards and pants, so that when you come, it will be displayed as 1 card or 2 cards.

I don't know I haven't used two cards.

If the phone call does not show the number, it is recommended that you:

1.To verify whether the caller ID function is enabled, contact the network operator for confirmation.

2.Some mobile phones support the hidden number function, check whether it is set: mobile phone (**) - more (menu key) - call settings (settings) - other settings (more settings) - caller ID (display the local number) - select the network default setting (different models of mobile phones may have different operation paths).

3.Check if this is the case for all incoming calls, and rule out whether it is due to the other party making the call through an unusual channel such as the Internet**.

4.Try to change another SIM card.

SIM card 1 and SIM card 2 will be displayed when the call comes, so you can just look at the position of the two cards first.

Single SIM dual mode, if you want to use a dual SIM dual standby smart phone, I recommend OPPO R805, this is a new machine, dual SIM dual standby dual mode, mainstream configuration, physical store** in 1600 1900 No.

Hello! Lenovo mobile phone A520 put in dual SIM, if there is an incoming call, the upper left corner of the call interface (below the **number) will be displayed, if it is not clear, it is recommended to change the name of the SIM card through Settings - SIM card settings - please understand.

The customer service who can punch in asks whether to open the caller ID, it is possible that the other party is using the network** Software like Youxin You can't see the **number.

Change the system of the mobile phone, because it may be that the mobile phone system is not working.

Consult the customer service of China Mobile (Unicom) to see if the caller ID is not turned on.

The number used by the other party is not legitimate, and it will also be displayed: Unknown caller.

It is recommended that you repair it to see that it may be a system problem, we are a layman, or let an insider see it face to face to understand.

There are several more possibilities; 1. Have you ever changed the memory card, 2. Have you formatted the memory card, and 3. Whether the phone has been upgraded. If so, it means that your phone**Attribution file is lost, and the call is unknown**. You can go to your phone's official website to find your phone's home file or go to the service station to find your phone's home file.

Hope it helps.

Network**or ip**,Sometimes the restricted number or the number is unknown,There are some netizens below who answered,The other party hides their number,For example, private detective、Extortion,**etc.,There is also a network **card used for international calls**.