Xiaomi Redmi 4 remains a popular device due to its reliability and affordable price, but many new users have questions about initial setup. One of the most common tasks is to connect two numbers simultaneously to separate work and personal calls. This model has a hybrid slot, which requires careful installation of memory cards and communication modules.
Proper installation SIM-The card ensures stable reception of the signal and the correct operation of the mobile Internet. Incorrect location of the chip or careless handling of the tray can lead to damage to the contacts or even failure of the reader. Therefore, before starting the procedure, you need to carefully study the design of your device.
In this article, we will take a look at all the nuances of working with the Redmi 4 tray, determine the types of cards supported, and consider the typical errors that users make when you first install. Following these recommendations will help you avoid mechanical damage and immediately start using all the functions of the smartphone.
Installation preparation and map types
Before you start physically interfering with your smartphone, make sure you have the right components on your hands. Xiaomi Redmi 4 works with modern communication standards, but has its own form factor limitations. You'll need two Micro-SIM cards. Standard large SIMs or too small Nano-SIMs without an adapter will not be suitable for this device without pre-trimming or adapters, which may not be safe.
It is also important to check the status of the cards themselves. If you use old SIM cards that were cut manually or have damage on the contact area, it is better to contact the operator in advance for a replacement.
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If you SIM-cards are of different sizes, contact the operator's communication salon for a free replacement with Micro-SIM format. Do not try to cut the chip yourself with scissors, since there is a high risk of damage to the core area.
Make sure the phone is turned off. Although modern phones support hot replacement, it is safer to do all the manipulations when the two numbers are first set up when the device is de-energized, eliminating any software failures in identifying new communication modules.
Tray Anatomy and Hole Search
The design of the tray in Redmi 4
On the side, you'll see a little hole, and that's where you're going to push the tool, and it's important to hold the needle strictly perpendicular to the body, and if you put the tool in at an angle, there's a high risk of scratching the frame, or worse, of breaking the pusher's internal mechanism, and you need to push it confidently, but without fanaticism, until you click.
What to do if the tray does not fall out?
After extraction, carefully examine the tray. In Xiaomi Redmi 4, it has a combined design. On one side there is a platform for one. SIM-maps, on the other hand, a place under the second SIM Or a microSD card. The shape of the cutouts will not allow you to insert the card with the wrong side, but the effort to apply is still not worth it.
Step-by-step instructions for installing two SIMs
The process of setting two numbers requires consistency. First, we put the main SIM card, then the second one. The tray is removed, and you have two depressions in front of you. The first one, which is near the edge of the tray (usually marked with the number 1), is for the main SIM. The second one, located next to the memory slot (marked with the number 2), is for the second SIM.
☑️ Installation algorithm SIM-map
Take the first Micro-SIM and put it in the appropriate recess. The key point is that the contact pads (the golden part) should look down to the motherboard, and the cut corner of the card should match the shape of the tray. The map should lie perfectly flat, without protruding beyond the edges of the frame. If it rises above the surface, you inserted it incorrectly.
Repeat the procedure for the second SIM card in the second slot. It's also important to keep the contacts downward. Once both cards are in place, gently insert the tray back into the phone case. It should enter smoothly, without squeaking or jamming. If you feel strong resistance, don't push, take out the tray and check the position of the cards again.
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Main rule of installation: contact areas SIM-cards are always directed downwards, and the bevelled angle should exactly coincide with the shape of the cutout in the tray.
Network settings after switching on
After switching on the smartphone system MIUI It will automatically detect new modules. You can see welcome messages from operators on the screen. To manage two numbers, you need to go to the settings. Go to the Settings menu, then select the item. SIM-maps and mobile networks.
Here you'll see a list of installed cards, you can give them clear names like "Work" and "Personal" to avoid confusion, and this menu also sets the priority of which SIM is used for mobile Internet by default and which is used for voice calls, which is especially convenient if the operators' tariff plans differ in the cost of traffic.
Pay attention to the switch. 4G For stable operation of the Internet, it is recommended to activate this mode for the slot in which the installed SIM-better-coated LTE The second card can be in your area at this time. 2G/3G call-in.
Using a memory card with two SIMs
One of the main features of the Xiaomi Redmi 4 is the presence of a hybrid slot, which means that the second slot can accept either a second slot. SIM-If you're critically interested in using two SIMs and a memory card up to 128 GB at the same time, you can't do it with regular means.
| Configuration | Slot 1 | Slot 2 | The result |
|---|---|---|---|
| Standard. | SIM 1 | SIM 2 | Two numbers, no memory card. |
| Multimedia. | SIM 1 | MicroSD | One number, extended memory. |
| Maximum | SIM 1 + SIM 2 (split) | MicroSD | It is impossible without a special adapter. |
There are special adapters that allow you to install two SIMs and a memory card at the same time, but their use can lead to overheating or unstable operation of the radio module. Officially, the manufacturer supports only the choice: either two SIMs, or one SIM and a memory card.
Typical problems and ways to solve them
Even when installed correctly, users may find that the phone does not see one of the SIM cards, often due to contamination of contacts, carefully wipe the golden SIM pad with a soft eraser or dry cloth, and check if there is any dust inside the smartphone tray itself.
⚠️ Warning: If the phone says "No" SIM-After falling or getting moisture, do not try to charge the device. moisture may have caused a short circuit in the power supply of the sim reader.
Another common problem is frequency incompatibility. If you bring your phone from another region or use an old carrier, make sure that the frequency range of your SIM card is supported by the Redmi 4 modem. In the settings, you can try manually selecting the network by switching automatic search.
Why is the phone warmed up with two SIMs?
In rare cases, you need to reset your network settings, which will not delete your personal data, photos or apps, but will return the connection settings to factory values. You can do this from the Advanced Settings menu -> Reset and Reset -> Reset your Wi-Fi, mobile Internet and Bluetooth settings.
Can I use two different operators?
Why is the second SIM not catching 4G?
How to transfer contacts from an old SIM card?
Does setting up two SIMs affect the speed of your phone?
⚠️ Warning: Never insert or remove a SIM card tray while the phone is on if there is an active data recording process or system update at that time.
Following these instructions, you can effectively use the capabilities of your Xiaomi Redmi 4. Properly configuring two numbers will optimize communication costs and always stay connected.