Owners of smartphones Xiaomi, Redmi and POCO Often, they're faced with the need to migrate all the data from the old device to the new one, and the key to this process is not only to restore applications, but also to synchronize correctly. SIM-This term is usually understood as two actions: the transfer of contacts from the SIM-Cards to a cloud account or to a new device, as well as activation of the Mi service SIM for the use of virtual numbers.
The setup process can seem confusing due to the features of the MIUI shell or HyperOS. Misconduct sometimes leads to the phone no longer seeing the network, or contacts remain scattered across different storages. In this article, we will take a detailed look at all aspects of working with SIM cards, from physical connection to cloud synchronization.
We'll look at the standard tools that you can use to avoid losing important data, and you'll learn how to import records properly, set priorities. SIM-Call cards and the Internet, and what to do if the device issues an error in registration in the network.
Preparing for synchronization and checking physical connection
Before you start software settings, you need to make sure that the physical connection of the communication module is correct. SIM-Xiaomi is often paired with a memory card slot or is hybrid.It is important to install the chip correctly, focusing on the bevelled corner of the plastic.
If the phone does not respond to the installation of the card, first check the status of contacts on the card itself. SIM-Oxidation or micro-scratches can prevent reading data. Gently wipe the golden contacts with a soft cloth without pile, without using aggressive chemicals.
You should also pay attention to the format of the map. In slots of modern smartphones, only nano-SIM is suitable. If you use adapters or cropped cards, the probability of reading error increases many times, in which case it is better to request a duplicate from the operator.
⚠️ Warning: Never try to insert or remove SIM-card while the smartphone is on, if the model does not support hot replacement (although most modern Android devices allow this, the risk of static discharge or failure of the power controller always exists.
Once the device is turned on, the system must automatically detect a new map. If this does not happen, check if the tray is tightly attached. The gap may indicate mechanical damage or dust entering the housing.
Contact synchronization is the first step to take after installation. SIM-Storing numbers directly on a carrier chip is considered an outdated method because the capacity is not available. SIM limited and the information stored is minimal (usually only name and number).
To transfer data, go to the standard Contacts app. In the upper right corner, find a three-dot menu or a gear settings. You are interested in "Import/Export Contacts." Here, the system will suggest selecting source and destination.
Select the option “Import with” SIM-The system will suggest you choose an account where the data will be stored, the optimal choice is your Google account or Mi Account, which will ensure the safety of the data even if the smartphone itself is lost or broken.
The copying process takes a few seconds. Once completed, it is recommended to check several records to make sure that the numbers are displayed correctly and not cropped. If more than 200-250 contacts have been saved on the SIM, some of them may not be transferred due to storage format limitations on older chips.
Setting up Mi Account and cloud synchronization
Xiaomi's ecosystem offers a powerful backup tool, the Mi Cloud, which requires you to log into your Mi Account, which allows you to synchronize not only contacts, but also call history, SMS-Messages and Notes Between All Brand Devices.
To activate the function, go to Settings → Mi Account. Log in using your data. In the cloud services menu, search the Sync section and make sure the switch opposite the Contacts item is activated. The system will suggest combining local data with cloud data if they differ.
Mi Cloud is especially important for users who frequently change devices or use multiple gadgets at the same time, which creates a single information environment, but it is worth remembering that free space in the cloud is limited, and large amounts of data may require a subscription.
What to do if the contacts are duplicated?
Frequent synchronization from different sources (SIM, Google, phone, you may see duplicates. To resolve them in the Contacts app, go to the settings and select the "Combine Duplicates" function. The system will automatically find the duplicates and prompt them to merge.> It is important to check synchronization status regularly. If the cloud icon in the notification curtain shows an error, the place may have run out or a re-authorization is required. A stable Internet connection is a prerequisite for the correct operation of the service. SIM Virtual numbers and services deserve special attention SIM (Mi Drop in some interpretations, but more often it is a virtual number through the Jego app or similar add-ons in China, which allows you to get virtual numbers from different countries for calls and other applications. SMS card-switch. To work with virtual numbers, you need to download the corresponding application from the GetApps store or Google Play. SIM-You can then rent a room and use it over an Internet connection, which is ideal for travelers or business people who need to keep in touch with customers from other countries. Tariffing in such services is usually more transparent than roaming in traditional operators, and it is worth noting that the functionality of virtual numbers can vary depending on the region of the firmware. In global versions of the software, some Chinese services may not be available or require additional configuration through a change of region in the phone settings. Solving network display and logging problems The situation when the phone sees SIM-The screen can display a crossed-out SIM icon or a "No Network" sign. The first step should always be to reboot the device, which resets the modem errors. If the reboot didn't help, check the settings of the access points (APN). Incorrect Internet settings can block registration in the data network, which sometimes affects voice communication. SMS. The problem may also be the choice of network type. → SIM-maps and mobile networks → Choose. SIM-map → Try changing your preferred type of network. Switching with 5G/LTE on 3G/2G It can help you determine whether it's a tower cover or a frequency compatibility. In rare cases, you need a complete reset of your network settings. This action will remove stored Wi-Fi passwords and Bluetooth pairs, but often resolves deep programming conflicts of the communication module. → Connection and sharing → Resetting Wi-Fi, mobile networks and Bluetooth: setting priorities and managing two SIM-Most Xiaomi users use two cards SIM-It provides flexible tools to manage them, so you can assign one card to the mobile Internet and leave the other card for voice calls. SIM-And if you activate it for calls or messages, the phone will ask you, before each action, which SIM to use. This is convenient if you change your plans often or call different directions. SIM-This feature is useful in areas of unstable reception, allowing you to stay in touch at the expense of the second operator. Settings parameter Description of function Recommendation Mobile Internet Selection of the main card for data transfer Choose a card with unlimited tariff or large package GB Voice calls Default for outgoing calls Install a card with cheap minutes or unlimited on the network SMS-Main number for sending texts Choose a card whose tariff includes packages SMS 4G/LTE Preferences High-speed Internet Include for the main SIM, disconnect to save battery for the second Proper setting of these parameters allows not only to save money, but also to extend the battery life of the smartphone, since the communication module will not constantly search for the network on the second Both cards simultaneously in high speed mode. ⚠️ Note: When using two active SIM-map-mode 4G/5G Battery consumption can increase significantly. If you are in a weak signal zone, the system will spend more energy maintaining the connection, in such cases, it is recommended to temporarily switch one of the cards to the "Only" mode. 2G/3G». Frequently asked questions (FAQ) Why does the phone write «SIM-It can be caused by contamination of contacts, improper installation of the tray or software failure. Try to remove the card, wipe the contacts with an eraser (gently) and insert back. If it does not help, check the card on another phone. How do you transfer contacts from your iPhone to Xiaomi? The easiest way is to use a Google account. On your iPhone, go to iCloud settings and enable Google Contact Sync, or export them to a.vcf file and import them through the Contacts app to Xiaomi. Is it safe to store contacts on your iPhone? SIM-No, it's not recommended. Memory. SIM-The map is limited, doesn't protect against loss when the card breaks, and often cuts off long names. Better to sync with Google Account. Can you use one? SIM-A card on two Xiaomi phones at the same time? Physically, no, one SIM It only works on one device, but it uses services. IP-You can stream calls to another device, or you can forward calls to another device. 4G/LTE After the update? Check the access point settings (APN). Sometimes, when you update your firmware, you reset your operator settings. Create a new hotspot with the settings you get from your provider.