Can I still use my domestic mobile phone after going abroad to change my local card?

Of course, mobile phones can be available anywhere, but there are 3G4G networks abroad, and domestic ones can't reach it, but they are generally going abroad for foreign custom machines, because the tariffs will be preferential.

Unicom is WCDMA, which can be used.

The WCDMA used in Australia, the European standard (standard), is used by Unicom in China.

The United States uses CDMA2000, the American standard (standard), and the domestic is used for telecommunications.

TD-SCDMA for mobile use, Chinese standard (standard), is currently only used in China.

It depends on whether the phone is unlocked or locked.

The locked version is to add a network lock, that is, to bind the operator, such as the American version of AT&T, the British O2. Such a mobile phone can only be used by inserting the SIM card of the corresponding operator, and it cannot be used by inserting other cards. For example, to buy this type of locked iPhone in China, it is through signing a 1 2-year network access agreement with an operator, binding a credit account, committing to how much or how much yuan a month to consume, and buying the machine at a discount or giving it away for free.

In this way, the mobile phone cost of the iPhone has been converted into the phone bill of the corresponding carrier. If you want to use a different card, then the iPhone needs to be jailbroken and then unlocked. Only through these two processes can a locked iPhone use another carrier's card.

The signal of the unlocked individual models is out of tolerance.

OK. However, international roaming data is required**. International and Hong Kong, Macau and Taiwan Roaming Data Days** include Hong Kong, Macau, Taiwan, Singapore, Malaysia, Thailand and South Korea, a total of 7 countries and regions, and the service targets are mainly international and Hong Kong, Macao and Taiwan roaming customers who frequently use mobile phones to access the Internet.

<> domestic ** card cannot be used abroad.

Because the frequency band of foreign mobile phones is different, and the domestic signal cannot be searched abroad, the frequency band of the signal transmitted by the domestic signal tower is different from that of the foreign tower, so it cannot be used.

Playing ** is a convenient way for people to contact each other, through **especially international long-distance**, you can connect the two sides who are thousands of kilometers away or even tens of thousands of kilometers, which not only eliminates the fatigue of long-distance travel, but also saves time and travel costs, and greatly improves the efficiency of service.

The mobile phone card can still be used when you go abroad.

The mobile phone number can still be used after going abroad, but it should be noted that it is recommended to activate the international roaming of the mobile phone card to be used before going abroad. After that, the domestic mobile phone card can be used normally abroad. It's just that the tariffs are different in each country.

You can consult China Mobile, Unicom or China Telecom on what to do with your customers. If you do not activate international roaming service in the future, the mobile phone will not be able to communicate in foreign countries.

If you need to open the mobile phone international roaming service, you can bring your ID card to the local business hall for processing, or you can handle it through manual customer service, online business hall, etc., so that you can use it normally after leaving the country.

National roaming: Roaming is a commonly used term for mobile phone users, which refers to the fact that mobile ** users can continue to use their mobile phones in some other regions or countries after leaving their region or country. International roaming means that users can also enjoy a series of services provided by telecom operators abroad, such as **, SMS, MMS, and mobile Internet access.

Due to the different mobile phones, different business operators and different countries to go, whether you can open the service needs to go to the business hall to consult the relevant personnel. Brother Li <>

OK. However, international roaming data is required**. International and Hong Kong, Macau and Taiwan Roaming Data Days** include Hong Kong, Macau, Taiwan, Singapore, Malaysia, Thailand and South Korea, a total of 7 countries and regions, and the service targets are mainly international and Hong Kong, Macao and Taiwan roaming customers who frequently use mobile phones to access the Internet.

It can be used, but the cost is very high and you must open international roaming before you go abroad before you can use it (e.g., Shenzhou Travel users have to pay at least 300 yuan deposit in advance) Short-term travel abroad (such as: travel or participation in international conferences) can open international roaming Long-term travel abroad (such as:

Study abroad or labor export) It is recommended to get a local card after going abroad, I hope these can be useful to you.

After activating international roaming**, it can be used normally, and the steps to activate it are as follows:

2. Log in with your mobile phone number to enter the business handling page, and then click "International Hong Kong, Macao and Taiwan".

3. Select the corresponding country on the "International Hong Kong, Macao and Taiwan" page that opens, here "Japan" as an example.

4. Then choose a suitable **, take the Japan 5-day traffic package ** as an example.

5. Then click "Apply Now" to successfully handle the **, so that it can be used normally in Japan.

After activating international roaming**, it can be used normally, and the steps to activate it are as follows:

2. After logging in according to the prompts, click "Business Handling" below, and then click "International Hong Kong, Macao and Taiwan":

3. Select the region in the open region selection page, here "Japan" is used as an example

4. Then select a **, here take 5 days ** as an example:

5. Then click "Apply Now" to successfully handle the **, so that it can be used normally in Japan.

Yes, you need to go to the business hall to handle the 'Global Pass' business, thank you.

China's mobile phone card needs to be used abroad to open international roaming**, after opening it can be used normally, taking China Mobile as an example, the method of opening international roaming is as follows:

1. Open "China Mobile" in your phone

2. After logging in according to the prompts, click on the "Business Handling" below to answer the question, and then click on the "International Hong Kong, Macao and Taiwan" option

3. Then enter the region selection page, here take Japan as an example, and click "Japan":

4. Select a**:

5. Click "Apply Now" to successfully handle the **, so that it can be used normally in Japan:

This depends on whether your mobile phone card operator can open international roaming, if you can slide to open international roaming, then your mobile phone card can be used when you go abroad.