Do I need to cancel the international roaming function after I return to China after my mobile phone

Whether or not you need to cancel international roaming depends on your specific usage needs.

If your phone is already roaming while you're using it abroad, and you still want to keep international roaming when you return home, you don't need to cancel it. On the other hand, if you have not used the roaming function abroad, or if you have returned to your home country and want to turn off the international roaming function, you can cancel the international roaming function through the online business hall, number 10000 or go to the business office.

It should be noted that if you have enabled the international roaming function when using your mobile phone abroad, you will need to cancel the function when you return to your home country so that your mobile phone can connect to the domestic communication network normally.

After returning home with the international roaming function enabled on the mobile phone, it is best to cancel the international roaming function.

According to the rules of the international carrier, the pricing power of international roaming rests with the operator in the user's location. In other words, domestic operators need to negotiate international roaming tariffs with foreign operators, but the pricing power is basically in the hands of the other party.

At the same time, almost all countries have more than one operator, so on the issue of roaming tariffs, domestic operators need to choose the appropriate foreign operator according to the network standard to negotiate and form a roaming cooperation agreement.

International roaming charges refer to the tariffs (**) for domestic users to use the mobile networks of overseas operators to obtain mobile communication services abroad, which are currently mainly divided into three categories: voice roaming, data roaming and SMS roaming.

Unicom users who have completed real-name registration, and the service status is normal, and there is no overdue arrears, can apply for international roaming in the following ways:

1. Log in to the online business hall of China Unicom.

Select [Processing] - [International Business Handling] - [International, Hong Kong, Macao and Taiwan].

Roaming], you can activate or cancel international, Hong Kong, Macao and Taiwan roaming services;

2. Log in to the China Unicom APP, select [Service] - [Handle] - [International, Hong Kong, Macao and Taiwan Services] - [Switch Roaming Service] to activate or cancel international, Hong Kong, Macao and Taiwan roaming services;

3. Bring valid documents to Unicom's own business hall for processing.

If you are suddenly unable to use the international communication function normally in a foreign country, you can check the following:

whether the card is in insufficient contact with the metal contacts of the mobile phone;

whether the card is damaged;

3.Whether the location is a dead zone or a sudden lack of signal.

If you have enabled the international roaming function, but you cannot use the function when roaming internationally, there may be one of the following reasons:

1.Some countries have different network standards and frequency bands, and you need to change to a suitable mobile phone terminal to use the international roaming function;

If the above problems still cannot be solved, you can call the international roam tourist service**+ 8618618610010 free service to report the situation (only when you use China Unicom mobile phone to call, it is free).

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What is the reason why my mobile phone cannot be used after going abroad if I have opened international roaming?

1. After going abroad, the mobile phone may enter a country where roaming service is not available, so the roaming function cannot be used normally. 2. The national mobile phone after going abroad may not have a network that supports roaming, so the roaming function cannot be used normally. 3. After going abroad, the roaming function of the mobile phone may be invalid because the mobile phone may be in the network of other operators.

4. After going abroad, due to the mobile phone entering the overseas network, the international roaming service may not be activated normally, so it cannot be used normally. 5. After going abroad, because the mobile phone may be in the overseas network, and the local network may not be supported by the service provider, the roaming function may not be effective.

1. Data roaming refers to the traffic generated by the use of the non-manual phone number in the place of ownership.

2. China Unicom's mobile phone number needs to be used to use the international roaming function, if you need to open it, it is recommended to use your mobile phone to log in to the China Unicom APP, click "Service", "Handle", "International, Hong Kong, Macao and Taiwan Business", "Switch Roaming Service", and select the type that needs to be handled.

3. Yes, you need to turn on international roaming and long-distance functions before going abroad, otherwise you will not be able to use voice and Internet access normally after going abroad. It is recommended to consult the local customer service** for relevant tariffs and other information before going abroad.

4. When you go abroad, you must open the international roaming and international long-distance functions, so that you can search for mobile phone signals abroad and be able to answer**. The opening method is: business hall handling, manual service handling (mobile 1008, Unicom 100, telecom 10000) and WeChat***.

5. Business - International Hong Kong, Macao and Taiwan - Open Roaming Function" menu item; Next, in the pop-up page, click the "**Handle" button to handle the business; Finally, in the pop-up dialog box, click the "Apply for the Grip Booth Now" button, and you can make normal calls abroad after handling the international roaming service.

6. International roaming is too expensive, so it is recommended not to use it. You can buy a portable wifi abroad, and you can access the Internet abroad**. Use QQ WeChat and the like to hit **, there is no problem at all.

You don't need to set it up, you can dial ** after the destination phone is turned on, but pay attention to the operator. There are many operators in some foreign countries and regions, and you can enter the network of any operator, but the tariffs of different operators are different, and you need to call free ** in advance to ask clearly.