Why am I in Korea, the China card of my mobile phone shows no service, and I have started international roaming?

Why has mobile started roaming, but there is no service abroad?

Why has mobile started roaming, but there is no service abroad?

1. After handling international roaming services through operators, in principle, mobile phone services can be used normally in roaming places where relevant services have been opened. If it is normal to be abroad a few days ago, there is a sudden state of no signal. It is suggested to change the machine and card to confirm whether it is a problem with the mobile phone number card for further judgment.

2. Take Jiangsu Unicom as an example: In this case, you are not logged into the roaming network, and follow the following steps: 1) You can use it overseas only when the international roaming function is enabled, and China Unicom's international roaming service is enabled at the roaming place.

3. If the cell phone signal is unstable or bad, suggestions: restart the cell phone or try another environment. Some models support changing the network mode. Please operate: Settings-More Settings (More Networks/Wireless Networks)-Mobile Networks-Network Mode-GSM (or 2G) Only.

4. Some countries or regions have different network standards and frequency bands, so it is necessary to replace appropriate mobile terminals to use the international roaming function; The mobile phone is set to automatically select the network, and no operator can be found to cooperate with our company. You can manually select a network by changing the setting to Manual Network Selection.

5. There are two kinds of problems with mobile phone cards. First, the mobile phone card got stuck when searching for signals, so it could not be connected automatically. You need to call the operator and ask the customer service to restart the mobile phone card. If there is still no service, it may be the second case, that is, the signal receiving ability of the mobile phone card itself is weak.

6. If the mobile phone card shows no service abroad, you can try the following methods to solve it: it may be that the contact between the SIM card and the metal contact of the mobile phone is poor, so it is recommended to take out the SIM card and try to insert it into the mobile phone again. Maybe the international roaming function is not enabled on the mobile phone card. You can contact the customer service hotline to enable international roaming and try again.

China Mobile has launched international roaming. How to solve the problem that there is no service in South Korea?

China Mobile has launched international roaming. How to solve the problem that there is no service in South Korea?

1. You can contact your mobile phone card service provider or mobile phone manufacturer to find out whether your mobile phone card can be used by Korean network operators or whether you need to replace it with a new one. In addition, you can also go to the local mobile phone shop or operator service center for help and solutions.

2. Step 1: Turn on your mobile phone, search China Mobile APP in the app store, download and install it. As shown in the following figure: Next, after logging in, click "Business Handling" at the bottom of the screen to see "International/Hong Kong, Macao and Taiwan" in the page. As shown in the following figure: Then, select Korea from the opened page.

3. If the mobile phone card shows no service abroad, you can try the following methods to solve it: it may be that the contact between the SIM card and the metal contact of the mobile phone is poor, so it is recommended to take out the SIM card and try to insert it into the mobile phone again. Maybe the international roaming function is not enabled on the mobile phone card. You can contact the customer service hotline to enable international roaming and try again.

4. Some countries have different network standards and frequency bands, so it is necessary to replace the appropriate mobile phone terminal to use the international roaming function; The mobile phone is set to automatically select the network, and no operator can be found to cooperate with our company. You can manually select a network by changing the setting to Manual Network Selection.

Has Unicom's mobile phone opened international roaming to South Korea or no service?

Has Unicom's mobile phone opened international roaming to South Korea or no service?

After opening international roaming, everything is normal in China, and the mobile phone will not respond. In foreign countries, if the mobile phone still shows no service, you can manually select a network and choose a foreign operator. If there is still no network, you can use it after the phone is restarted.

It may be because the China card of your mobile phone is not supported by Korean network operators. There are protocol and compatibility restrictions between different mobile phone cards and network operators, which may make some mobile phone cards unusable in some countries or regions.

The calling card has expired. Please make sure that the phone bill balance is sufficient before going abroad. If the service is interrupted due to arrears, you can renew the fee and open the service through online recharge. There is something wrong with the mobile phone card slot. In order to confirm that there is something wrong with the mobile phone card slot, you can try a mobile phone card with sufficient balance and strong signal.

There may be the following situations: the international roaming function was not opened before going abroad; Verify whether the mobile phone card is in arrears.

Why is there no mobile phone service to Korea?

Why is there no mobile phone service to Korea?

1, hello, if you confirm that the international roaming function has been enabled, it will not work properly. Please check whether the local signal is normal, and try to search the local network connection manually and restart the phone. If it still doesn't work, it is recommended to contact the customer service number with another phone. If the non-Unicom number calls the customer service hotline abroad, it will be charged according to the number fee.

2. Due to the 3G network of individual operators, it may lead to a long time for mobile phones to search 3G networks, thus affecting normal use. In some countries or regions, the network standards and frequency bands are different, so it is necessary to replace the appropriate mobile phone terminal to use the international roaming function.

3. Software or system reasons. When brushing the machine, it is best to use the official ROM mobile phone hardware failure and send it for repair.

4. There may be the following situations: the international roaming function was not opened before going abroad; Verify whether the mobile phone card is in arrears.

5. A Korean friend's mobile phone shows a non-service MAC. I have launched an international roaming package, and I found that my mobile phone stopped working these two days. WIFI can be used, but the mobile phone can't send text messages, and there is no service. ... has launched an international roaming package and found that the mobile phone has no electricity these two days.

6. Step 1: Turn on your mobile phone, search China Mobile APP in the app store, and download and install it. As shown in the following figure: Next, after logging in, click "Business Handling" at the bottom of the screen to see "International/Hong Kong, Macao and Taiwan" in the page.

Why is there no signal in Korea? China Unicom card has roaming.

Why is there no signal in Korea? China Unicom card has roaming.

It may be because the China card of your mobile phone is not supported by Korean network operators. There are protocol and compatibility restrictions between different mobile phone cards and network operators, which may make some mobile phone cards unusable in some countries or regions.

If China Unicom card is used to open international roaming, but it can't be used in Korea, it is caused by the problem of network standard. Because Korea and Japan adopt WCDMA technology, they do not support GSM network.

If it still can't be solved, you can dial the local customer service access number of China Unicom 00798-852-2 1 120 by using local fixed telephone or local mobile phone, and access the domestic China Unicom international/Hong Kong, Macao and Taiwan roaming customer service desk for help, without paying the international roaming/Hong Kong, Macao and Taiwan roaming and international long-distance charges.

My mobile phone has been enabled for roaming abroad, but now it shows no service?

My mobile phone has been enabled for roaming abroad, but now it shows no service?

1. Take Jiangsu Unicom as an example: In this case, you are not logged into the roaming network, please follow the following steps: 1) Only when the international roaming function is enabled and the international roaming service with China Unicom is enabled at the roaming place can you use it overseas.

2. After handling international roaming services through operators, in principle, mobile phone services can be used normally in roaming places where relevant services have been opened. If it is normal to be abroad a few days ago, there is a sudden state of no signal. It is suggested to change the machine and card to confirm whether it is a problem with the mobile phone number card for further judgment.

3. First, open the "Settings" application of the mobile phone. In the settings list, click the General button, and then click Open Cellular Network. After "Cellular Mobile Data" is turned on, there are generally three mobile networks to choose from in the list, with the fastest speeds of 2G, 3G and 4G.

4. If it can't be used normally in the case of international roaming, cause analysis: check the international/Hong Kong, Macao and Taiwan roaming services (including basic functions, internet access functions, etc. ) is already open.