Replacement procedure SIM-The Redmi series usually does not cause any problems, but the Xiaomi Redmi 8 Pro has its own design features. Unlike many modern flagships, where the tray is combined and requires a choice between a second SIM card and a memory card, a separate slot is used here. This allows the user to use two of these simultaneously. SIM-Nano-SIM card and one microSD card without any compromises.
Installing the chip incorrectly can cause the device to stop seeing the network or to work unstable. It is important to consider that mechanical damage to the contacts or the tray itself can require expensive repairs at the service center, which is why you need to follow a clear algorithm of actions to avoid errors when replacing the communication module.
In this guide, we will take a look at the entire process, from tool preparation to software setup after physical replacement, how to safely remove the tray, how to correctly navigate the chip, and what to do if the smartphone does not see the new operator card, and these rules will ensure that your gadget will work smoothly on 4G/LTE networks.
Tool preparation and compatibility check
Before you start a physical replacement, make sure you have everything you need on hand.To work with the Xiaomi Redmi 8 Pro tray, you will need a special clip that comes with the device. If the original one is lost, you can use a thin needle or an unbended stationery clip, but you need to act extremely carefully so as not to scratch the case or damage the latch mechanism.
The critical point is to check the format of your new SIM-This model requires only the Nano-SIM format, which is the smallest of the existing standards. Using Micro-SIM or Standard-SIM cards without professional cropping or adapter is impossible, as they will not physically fit in the tray and can get stuck inside the case.
It is also recommended to turn off the smartphone before the procedure, and although modern phones support hot replacement, power cuts minimize the risk of software failures and protect the board contacts from static electricity, which is especially true if you change the card in low humidity.
- 📱 Special paper clip for extracting the tray (comes complete)
- ✂️ New SIM-Nano-SIM card from your operator
- 🧼 Dry soft fabric for wiping contacts (if necessary)
- 🔦 Light source for better view of small details
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If you crop the card yourself, make sure that only the plastic edges are cut and that the golden contacts are not touched. Even a microscopic scratch on the chip can cause signal loss.
Location of the tray and the extraction process
In the Redmi 8 Pro model, the tray for SIM-the card is located on the lower end of the device, in the center, near the connector USB Type-C. This is the standard location for most Xiaomi smartphones. On the end of the face, you'll see a small circular hole and an oblong tray contour.
Put the tip of a paper clip or needle into the hole perpendicular to the phone body. Don't be afraid to press a little harder than you think - the mechanism (spring) inside is quite tight. You should feel a slight click, after which the tray will extend out a few millimeters, and then you can carefully remove it with your fingers.
⚠️ Warning: Never attempt to remove the tray unless it has moved out after pressing the paper clip.Forced pulling can break plastic guides or damage the internal latch, requiring the smartphone to be disassembled.
Notice the design of the extracted tray. In the Xiaomi Redmi 8 Pro, it has three seats: two for the SIM-This is different from hybrid trays where the second SIM and memory share one slot. This configuration makes it easier to do this, since you don't have to choose between an additional SIM card and a memory extension.
Proper installation of SIM-card in the tray
After removing the tray, carefully examine its shape. It has special notches that exactly repeat the contours of the Nano-SIM card. Set the card in the appropriate socket (usually numbered as SIM 1 and SIM 2). Golden contacts should look strictly downwards, to the inside of the tray, and the cut angle of the card should coincide with the shape of the notch.
The card should be perfectly flat in the recess, without protruding or staggering. If the card is above the level of plastic tray, it means that it is installed incorrectly or contaminated. The Redmi 8 Pro uses a tight fit, so the card is fixed securely without additional clamps.
☑️ Installation verification SIM-map
If you use two SIM cards, make sure they are set to the right slots if priority is important to you. Usually the first slot (SIM 1) is used for the main card with an Internet tariff, and the second one (SIM 2) is used for calls. While in MIUI settings priorities can be changed programmatically, the physical installation in the first slot often provides a more stable start to the network when the phone is turned on.
Inserting the tray back into the smartphone
Put the card tray back into the body of the device. You need to do this smoothly, with orientation. The tray has only one correct entry position; if you try to insert it upside down or on the other side, it just rests in the case and does not enter. Don't use force — if the tray does not enter, turn it over.
Push the tray until the characteristic click. This sound means that the latch has worked, and the tray has stood level with the body, ensuring tightness (although this model does not have full moisture protection, a dense fit protects against dust).
After turning on the device, look at the top of the screen (status bar) and display signal level indicators and operator designations (MTS, Beeline, Megafon, etc.) if you see a 4G or LTE icon, the map is installed correctly and the network is running at high speed.
What to do if the tray is stuck?
Set up the network and SIM priorities in MIUI
After a physical card replacement, software setup is often required. MIUI, The one installed on Xiaomi Redmi 8 Pro allows you to flexibly manage two SIM cards. To access the settings, go to the Settings menu, then select the option. SIM-maps and mobile networks. This is the status of each card.
In this section, you can assign which card will be used for mobile Internet by default and which for voice calls and SMS. This is especially convenient if you have a tariff with a large amount of traffic on one SIM and unlimited minutes on another.
Also on this menu is the important VOLTE (Voice over LTE) switch, which if your carrier supports this technology, be sure to activate it, which will allow you to have high-quality conversations while using the 4G Internet, without switching your phone to 3G or 2G mode during the call.
| Setup parameter | Description of function | Recommended value |
|---|---|---|
| Mobile Internet | Selection of a data transfer card | Map with unlimited traffic |
| Default calls | Map for outgoing calls | Cheap minutes map |
| SMS default | Message map | Main map |
| Network mode | Preferred type of communication | Preferably 4G (LTE) |
Solution: The phone can't see SIM-map
Sometimes, when you change the card, the device may not recognize it. SIM-"Put in the cards" or "Put in" SIM-First, check if the card is sitting tight in the tray. Sometimes the contact is broken due to oxidation or dust. Wipe the contacts of the map with dry soft cloth and reset it.
If the physical setting is correct but the network does not appear, check the settings in the item SIM-maps and mobile networks. Make sure that the activation slider is specific. SIM-cards are enabled (it can be gray if the card is not read). Also try to switch the network mode manually: select Preferred 4G, Even if the coverage in your area is unstable, it often helps the phone to "grab" the tower.
In rare cases, the problem may be in the card itself (for example, it is blocked by the operator or damaged). SIM-If it doesn't work there, then you can contact the carrier's office to replace it. If the other phone does, you may need to reset your network settings to Xiaomi.
⚠️ If after all the manipulations the phone says "No service" or "Emergency calls only", check if the phone is locked by the phone. IMEI. This is true for devices imported from abroad unofficially.
Cleaning contacts and tray maintenance
Over time, dust and oxides can accumulate in the tray and on the contacts of the smartphone, which worsens the connection. SIM-It is recommended to carry out preventive cleaning. Use a cotton swab slightly soaked in alcohol (not abundantly!) to wipe the contacts inside the tray.
To clean the contacts inside the phone (where the tray is inserted), use a dry soft brush or pear to purge. Do not use metal objects inside the phone, as you can accidentally close contacts and damage the radio module. Regular maintenance prolongs the life of the connector.
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Regular cleaning of contacts SIM-Cards and tray alcohol napkin prevents 90% of problems with signal loss and spontaneous disconnection of the network.
Remember that Xiaomi Redmi 8 Pro is a reliable device, but it requires careful handling of mechanical elements. Careful handling of the tray will ensure a long and stable operation of your smartphone in the networks of any operator.