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iPhone plug-in no service: what should I do?UEFA EURO As one of the leaders in the field of smartphones, the signal reception ability of iPhone has always attracted much attention. However, sometimes we will inevitably encounter such a situation: the card is inserted, but the iPhone still shows no service, and the mobile phone cannot make calls, surf the Internet and other services. So, what should we do when we encounter this situation? I. Check whether the card slot is normal. If it is insertedIf it is a Nano card, first of all, confirm whether it is compatible with the carrier supported by the iPhone. If it is confirmed that the card is suitable, you need to check whether the card slot is impurities or damaged. The way to check the card slot is very simple. Usually, you can gently brush it with a note or a small brush dipped in a small amount of alcohol. II. Check the signal coverage. When the iPhone cannot receive the signal, it is possible that the signal in our location is weak or does not exist. We need to check the signal coverage. You can try to test elsewhere, such as going to a relatively crowded place to see if you can connect to the mobile network. III. Check whether the flight mode is turned on. Sometimes the mobile phone flight mode is turned on, which will make the mobile network unable to connect, so please check whether the flight mode has been turned off. Open the settings interface and check whether the flight mode is turned on under the "Airplane Mode" option.IV. Try to restart the iPhone. Sometimes there is a problem with the mobile phone system, which will cause the signal to not be connected. At this time, it will be helpful to try to restart the mobile phone. The method is to press and hold the power button above or on the side of the mobile phone and drag the slider to turn off the device. After waiting for a few seconds, press and hold the power button again to turn it on. If the signal still cannot be connected after restarting, try the next solution. V. Update the iPhone system or restore the factory settings. If the above measures are not solved, you need to update the system or restore the factory settings. However, please pay attention to the backup data before resetting or updating the system. The following are the operation steps: Update the system: Click "Settings" > "General" > "Software Update" and select "Download and Install". If there is an update in the system, you will find the available download link.If you can update and solve the signal problem smoothly, congratulations, the problem has been solved! Restore factory settings: Click "Settings" > "General" > "Reset" > "All Content and Settings", which will restore the device to factory settings. Before performing this operation, be sure to back up the data to iCloud or iTunes. There are many reasons why there may be no service problem, so if the above methods do not solve the problem, please contact Apple's after-sales customer service. In a word, card insertion without service is a relatively common problem. In many cases, we just need to check patiently and solve the problem step by step. I hope this article can help you solve the problem of no service for iPhone card insertion.

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