How to insert it correctly SIM-card in the smartphone Xiaomi Redmi 4X: photo-instruction

Xiaomi Redmi 4X — One of the brand's most popular budget smartphones, released in 2017, and despite its venerable age, the device is still in active use today due to its reliability and the ability to install two of its two devices. SIM-However, new owners (or those who have not changed cards in a long time) often have questions: how to open the tray correctly, how big is the size of the card. SIM What to do if the phone does not see the network after installation.

In this article you will find step-by-step instructions with a photo, tips for pruning SIM-We took into account all the nuances of a particular model, including the slot location, the features of the hybrid tray and the compatibility with carriers in 2026.

Preparation: what type SIM-Cards are needed for Xiaomi Redmi 4X

Redmi 4X supports two nano-SIM cards (4FF format) or one nano-SIM + microSD card up to 256 GB. This is a hybrid slot, so you can not use two SIM and a flash drive at the same time.

If you're old. SIM-mini-SIM (2FF) or micro-SIM (3FF), You have to cut it or replace it in the operator's cabin, and you can do it yourself with a stacker or a scissor, but carefully so as not to damage the chip.

• 📏 Nano-SIM dimensions: 12.3 × 8.8 × 0.67 mm
• ⚠️ Important: the chip should remain intact, cut only plastic!
• 🔄 Alternative: in the salons of MTS, Beeline, MegaFon and Tele2 will be replaced SIM free of charge for 5 minutes.

Before installing, check if yours is activated. SIM-If you just bought it from a carrier, you might need to register through a website or call a hotline. 4X There is no eSIM slot, so virtual cards are not supported.

Where is the slot for SIM-maps in Xiaomi Redmi 4X: photo

At Redmi. 4X squash SIM-The card is located on the left side of the case (if you look at the screen), it is combined with a socket for the memory card and has a small hole to extract.

To avoid confusion, focus on these signs:

• 📱 The tray on the right? No, these are volume and power buttons.
• 🔊 No, there's a headphone jack (3.5 mm) and a microUSB.
• 🔋 No, it's the back panel (removable, but you don't have to take it off!).

Pictured: slot for SIM-The card is marked in red. The clip hole is clearly visible.

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If you can’t see the opening to extract the tray, light up with a flashlight – sometimes it’s hidden under a protective film or contamination.

Step-by-step: how to open the tray and insert SIM-map

To remove the tray, you will need a paper clip (or a special key from the set). If it is not available, an unbended stationery bracket or a thin needle will do.

Follow the algorithm:

1. Turn off your phone. This is not necessary, but it is recommended to avoid failures in card recognition.
2. Put the paperclip in the hole on the tray to the end, it should be a slight click.
3. Carefully pull the tray over yourself - it will move about 5 mm.
4. Completely remove the tray and place it on a flat surface.

Now set it up. SIM-map):

• 📇 For one. SIM: put her in the nest SIM 1 (usually closer to the edge of the tray).
• 📇📇 For two. SIM: Use both nests, but keep in mind that SIM 2 supportive 4G (only 2G/3G).
• 💾 For SIM + MicroSD: Install a memory card instead of a microSD card SIM 2.

Make sure that the golden contacts are SIM-The cards look down, and the bevelled angle matches the shape of the socket.

What to do if the tray does not open or jammed SIM-map

Sometimes the tray doesn't extend when you press it.

If the tray is broken (for example, a latch broke), do not try to repair it yourself - this can damage the motherboard. Xiaomi service center will replace the mechanism for 300-500 rubles.

Problems after installation: the phone can not see SIM-map

After installation SIM-Redmi card 4X Not catching the net, check the following:

⚠️ Note: If you use two of these SIM-- cards, make sure they're from different operators. + Tele2 may conflict due to common frequencies.

• 🔄 Restart the phone. Sometimes the system doesn't recognize the card right away.
• 🔧 Check the settings: go to Settings → SIM-Maps and mobile networks and select priority SIM call-to-internet.
• 📶 Update the firmware. Outdated software may not support new communication standards (e.g., VoLTE).
• 🛠️ Clear the contacts. Rub the golden stripes. SIM-slug-card.

If the phone says "No service" or "SIM-If the card is not recognized, try inserting it into another device, if the problem persists, the card is defective (contact the operator). If it works on another phone, the problem is Redmi. 4X:

• 🔌 Resetting network settings: Settings → System system → Reset → Resetting network settings.
• 📱 Hardware malfunction: Possibly damaged slot or antenna module (repair required).

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If the phone stopped seeing SIM-The map, after a fall or impact, most likely left the antenna plume.

How to set up mobile Internet and calls to two SIM-card

Redmi 4X allows you to flexibly configure the use of two SIMs:

1. Priority for calls: c Settings → SIM-Select which card will be used by default.

2.The Internet: Mobile data only works on one SIM. To change, go to Settings. → SIM-map → Mobile Internet.

3. 4G: Supported only on SIM 1. On SIM 2, the top speed is 3G.

If the internet is not working:

• 🌐 APN: Check the access points in the Settings → Mobile network → Access points (APN). For MTS it is Internet.mts.ru, for Beeline - Internet.beeline.ru.
• 📵 Flight mode: make sure it is switched off.
• 🔄 Manual network selection: C Settings → Mobile network → Network operators select their operator manually.

Redmi 4X does not support VoLTE (voice over 4G), so calls will always go on 2G/3G, even if the Internet is connected via 4G.

Frequent questions and errors in installation SIM-map

We have collected answers to the typical questions of owners of Xiaomi Redmi 4X: