Introduction: Why the Right Installation SIM-Cards are important for Redmi 4A
Smartphone Xiaomi Redmi 4A It's a popular choice among users who value reliability and budget cost, but even a simple operation like installation. SIM-This can cause questions, especially for beginners. Installation is often a failure of the network, a failure of the "no" system. SIM» or even damage to the slot contacts.
In this article, we will discuss all stages of the process: from choosing the right one to the right one. SIM-maps before diagnosing problems after installation, we will pay special attention to the nuances of the Redmi design 4A, It's different from other Xiaomi models, like why this phone doesn't have two. SIM-Cards at the same time (despite a hybrid slot) and how to avoid typical errors when first switched on.
If you have just purchased a Redmi 4A or are considering changing operators, keep this instruction, which will save you time and eliminate the need to contact the service center for trifles.
What? SIM-The card is supported by Xiaomi Redmi 4A: nano-SIM or micro-SIM?
One of the most common questions users ask is what size. SIM-I need a card for Redmi. 4A. The answer is clear: the phone supports only nano-SIM (format) 4FF, 12.3 × 8.8 This is important to consider, as:
- ⚠️ Using adapters (e.g., nano-SIM in a micro-SIM slot) can lead to unstable network performance or identification errors.
If you have only a micro-SIM or a standard card, contact your operator’s communication salon (MTS, Beeline, MegaFon, Tele2) – they will exchange it for nano-SIM for free in 5-10 minutes. The alternative is to crop the card yourself with a special stapler, but this is risky: the slightest displacement of the scissors can damage the chip.
Important: Xiaomi Redmi 4A has a hybrid slot, but that doesn’t mean it supports Dual SIM as usual.
- 📶 One nano-SIM + microSD (up to 256 GB).
- 📶📶 Two nano-SIMs (without memory card).
⚠️ Attention: When using two SIM-maps 4A Does not support networking 4G both maps simultaneously. SIM (slot 1) will work in 4G, and the second (slot) 2) — only 2G/3G.
Where is the slot for SIM-maps in Xiaomi Redmi 4A: photo
Unlike Xiaomi’s flagship models, where the slot can be placed on top or side, in the Redmi 4A it is on the left side of the face (if you look at the phone screen).
- 🔧 Paperclip or special key (company with phone).
- 📍 Bright lighting - the hole for extracting the tray is small and poorly noticeable.
Visually, the slot looks like a thin slot with a small circular hole next to it, and the photo below shows its exact location:
If you can't find the hole, swipe your finger on the left edge of the phone - you'll feel a small protrusion.Don't try to open the slot with your nail or sharp objects: this can scratch the body or break the tray's locking mechanism.
💡
If the key to retrieve the slot is lost, use an unbended clip or syringe needle (only with a blunt end!).Put it at a 45° angle and press with force - the tray will be pushed out with a characteristic click.
Step-by-step instruction: how to insert SIM-map 4A
Now, to the process itself, follow the instructions in strict order to avoid errors.
- Turn off your phone. It's a must: hot replacement. SIM-The card can cause a modem malfunction.
- Find a hole to remove the tray (see section above) and insert a clip into it to the end. The tray should extend 2-3 mm.
- Take the tray out by the protruding part carefully. Don't pull it out, there's a spring mechanism inside.
- Put the nano-SIM in the appropriate slot: 🔹 Chip down (golden contacts should be facing the back of the phone). 🔹 Angle to the left (the cut corner of the map coincides with the beveled angle of the groove).
If you use two SIM-map
Put the tray back in.
Turn on the phone.
☑️ Check before turning on the phone
If you turn on the phone, you can’t see SIM-map, go to the section "Resolving problems».
⚠️ Attention: Never insert SIM-card with tape or tape glued - adhesive residues can get on the slot contacts and break the connection. If the card sits too loose in the tray, use special silicone pads (sold in accessories stores).
How to properly position two SIM-Cards: Slots priority
If you decide to use two SIM-maps 4A, It is important to understand how the phone distributes functions between them:
| Characteristics | Slot 1 (main) | Slot 2 (additional) |
|---|---|---|
| Support for 4G/LTE | ✅ Yes. | ❌ No, only. 2G/3G) |
| Voice calls | ✅ Yes. | ✅ Yes. |
| SMS | ✅ Yes. | ✅ Yes. |
| Mobile Internet | ✅ 4G/3G/2G | ❌ Only 3G/2G |
| Priority for calls | High (by default) | Low. |
All calls are made by default and SMS come first SIM-To change the priority:
- Go to Settings. → SIM-maps and mobile networks.
- Select Priority SIM-call-card.
- Specify which card to use by default.
If it is critical to have two SIM-maps, and additional storage, consider the following options:
- Cloud services: Move photos, videos and documents to Google Drive, Yandex Drive or Mi Cloud (built-in storage from Xiaomi).
- OTG-Buy a flash drive. USB-drive with a Micro-USB or Type-C connector (via adapter) and connect as needed.
- Replacement SIM Some operators (e.g. MTS) offer virtual SIM-cards that free up a physical slot for a microSD. 4A Does not support eSIM hardware.
If you travel frequently and need two physical SIM-Maps may need to consider switching to a model with full Dual support SIM + microSD, such as the Redmi Note 5 or POCO X3.