How to insert it correctly SIM-Map to the smartphone Xiaomi Redmi 4: instructions with photos and videos

Installation SIM-The Xiaomi Redmi 4 is a seemingly simple procedure, but even it can raise questions for a beginner, especially when it comes to first setting up the phone or replacing the operator, a model released in 2016-2017 that is still popular due to its reliability and low price. However, its design has nuances: for example, a hybrid slot for two. SIM-Nano-SIM cards that are not always available.

In this article, we will not only discuss the basic steps of installing a card, but also explain the types of formats supported, possible errors (for example, why the phone does not see SIM), and give tips for optimizing network performance. If you just bought a Redmi 4 b / y or got it out after a long downtime, the instructions will help you avoid typical problems.

The procedure for all versions of the series (Redmi 4, 4A, 4X, 4 Pro) is almost identical, but there are differences in the location of the slot and the communication standards supported. For example, Redmi 4 Pro works with 4G LTE networks, and the basic version of Redmi 4 only with 3G.

1. Which one? SIM-The cards are supported by Xiaomi Redmi 4

Before inserting the card, make sure it fits the format and communication standard. Xiaomi Redmi 4 works with:

• 📱 nano-SIM (4FF) — If you have a micro-SIM or a standard format SIM, It will have to be cut or replaced in the cabin of the operator.
• 🔄 Hybrid slot: You can install either two nano-SIMs or one SIM + microSD (up to 256 GB) at the same time two SIM, And the memory card, you can't.
• 📶 Communication standards: Redmi 4/4A: 2G (GSM), 3G (WCDMA), no 4G. Redmi 4X/4 Pro: 2G, 3G, 4G LTE (ranges depend on the region).

If you are planning to use two SIM-Check if your operator is working on the map. DSDS (Dual SIM In this case, both cards will be active, but during a conversation, one of the two will become unavailable.

⚠️ Note: Some operators (e.g. Tele2 or Iota) may block the second operation. SIM, If it's from another provider, check it out in advance.

2 Where is the slot for SIM-maps in Redmi 4

Xiaomi Redmi 4 trays for the SIM-The card is located on the left side of the phone (if you look at the screen), it is easy to recognize by the small hole for the key-clip (it comes with the phone), if the key is not available, a regular stationery clip or a needle with a curved end will do.

🔍 How to find a slot:

1. Turn the phone upside down.
2. Look at the left end – there will be a small round hole (about 1 mm in diameter).
3. If the phone is in the case, remove it - the case can block access to the tray.

On some versions (e.g. Redmi 4A), the slot can be on the right, depending on the version of the case. If you are not sure, look at the serial number under the battery (on the sticker): models for the Chinese market often have a mirror arrangement of elements.

3. Step-by-step instruction: how to insert SIM-map

Now, let's move to the immediate installation, follow the instructions to avoid damage to the tray or contacts. SIM-map.

📌 Procedures for action:

1. Turn off your phone (optional, but reduces the risk of failures when activating the network).
2. Put the key-clip in the hole on the tray and press until you click a little. The tray will extend 2-3 mm.
3. Take the tray out of the box carefully. Don't pull it around the corner, grab the side edges.
4. Put it down. SIM-slot-card: 🔢 For the first. SIM (main) - top slot. 🔢 For the second. SIM — Lower slot (unless microSD is used).

⚠️ Attention: The tray has tags for the correct positioning of the map. The contacts (the golden part) must be face down, and the cut corner must match the shape of the groove.

SD

Carefully insert the tray back before the click. Make sure it sits straight -- if it sticks out, try again.

Turn on the phone after installation. SIM-map recognized, in the upper panel will appear network indicator (for example, MTS) 3G Beeline 4G). If not, go to the section “What to do if the phone can’t see” SIM».

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If the tray is not inserted to the end, do not force it, SIM-The map is curved. Pull out the tray and check the map's location again.

4. How to activate SIM-map

Successful installation of the card is only half the battle, and it may require activation to work (especially if the card is new or has not been used for a long time).

⚙️ Network setup:

• 📶 Automatic Search: Go to Settings → SIM-maps and mobile networks → Network search. Select the operator manually if the automatic search fails.
• 🔄 Reboot: Sometimes a simple phone reboot helps – hold the power button 5-10 seconds.
• 📞 Balance check: Dial in USSD-A command to check the balance (for example *100# for MTS or *102# for Beeline.

If SIM-card PIN-code, it must be entered on the first turn on. PIN (If you haven't changed it, it's usually on the plastic holder that's been walking with the card. For example, for MegaFon, it's often 1234 or 0000.

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If the phone asks PUK-- I'm not sure if you're going to use the code, you can't enter it at random after 10 wrong attempts. SIM-The card will be permanently blocked. PUK indicated on the package from the card or you can find out from the operator by passport data.

5. Frequent errors and their solutions

Even with the right installation SIM-These are the most common and the ways to fix them:

If none of these methods helped, check:

• 🔌 Software Update: Outdated firmware can cause network problems. Check for updates in Settings → The phone. → Updating the system.
• 🛠️ Hardware damage: If the phone fell or got wet, the slot could have been damaged.

6. How to get out SIM-map from Redmi 4

Retrieving a map is even easier than installing it, but there are nuances here, too, and the main thing is not to use sharp objects (knives, forks) so as not to damage the tray.

🔄 Instructions:

1. Turn off your phone (but not necessarily).
2. Insert the key-clip into the hole on the tray and press before clicking.
3. Take the tray out carefully and remove it SIM-map.
4. If the card is jammed, do not pull it - slightly swing the tray left-right.

⚠️ Attention: If the tray is not extended, do not apply excessive force! this can break the mechanism. Try using a thinner tool (for example, a needle) or contact the service.

7. Advice on optimizing work SIM-map

So SIM-The card worked consistently, follow these guidelines:

• 📶 Manual Network Selection: If the phone is constantly “losing” the network, try Settings → Mobile network → Select Network Mode Only 3G or 2G (battery-saving).
• 🔋 Saving Charge: Turn off network search for second SIM, If you do not use it: Settings → SIM-map → Choice SIM call-in.
• 🛡️ Safety: Turn on PIN-request SIM-Cards (in the same settings) to protect them from unauthorized use.

If you travel frequently, look out for roaming.The Xiaomi Redmi 4 supports most European and Asian 3G/4G bands, but check with the operator for overseas communications before you travel.

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To speed up the internet on Redmi 4, turn off automatic network selection and manually select the standard (e.g, LTE only 4G-This will help to avoid constant switching between models. 3G and 4G, battery-eating.

Frequent questions about SIM-maps in Redmi 4