Xiaomi Redmi Note 4 is one of the most popular smartphones of the brand, released in 2017, but still actively used. SIM-This model raises questions for beginners: where is the tray, what size SIM is needed, how not to damage the slot when extracting. In this article, we will analyze all the nuances from tool preparation to checking the connection after installation.
The Redmi Note 4 (codenamed mido) features a hybrid slot that supports either two nano-SIMs or one nano-SIM+ MicroSD card up to 256GB. This means you have to choose between a second SIM and a memory extension, and we’ll show you how to optimally allocate resources and avoid common mistakes, such as improperly trimming the SIM or damaging the contacts.
What? SIM-The card supports Xiaomi Redmi Note 4
Xiaomi Redmi Note 4 works exclusively with nano-SIM (4FF format, size 12.3×8.8 mm). If you have a SIM of a different size (mini or micro), it will have to be trimmed or replaced in the cabin of the operator.
- 🔌 Bad contact – the phone may not recognize the network or periodically lose the signal.
- 🔥 Overheating of the slot - improperly cropped SIM can close the contacts.
- 📵 Warranty loss – if the slot fails due to artisanal pruning, the service center will refuse repairs.
Important: Redmi Note 4 supports 2G/3G/4G LTE networks, but to work two Sims at once, 4G will be available only on one of them (the second will switch to 3G).
Where is the slot for SIM-Maps in Redmi Note 4
The Sim tray in the Xiaomi Redmi Note 4 is located on the left end of the case (if you look at the screen with the front side), it is easy to identify by a small hole for the tool-clips. On some modifications (for example, Redmi Note 4X), the slot can be on the right — this depends on the regional version.
To avoid confusion, focus on:
- 📏 Location of buttons – the slot is always on the side of the volume button.
- 🔍 Marking – there may be a barely noticeable inscription next to the hole SIM card-pictogram.
- 🛠️ Protective cap - on some models, the hole is closed with a rubber cap (relevant for versions with protection) IP53).
How to distinguish the Redmi Note 4 from the Note 4X?
Step-by-step instruction: how to insert SIM-map
Before you start, make sure that the phone is turned off, this will prevent possible malfunctions in the modem. If the SIM is installed for the first time, we recommend also removing the case (if any) - this will make it easier to access the slot.
- Prepare the tool. The Redmi Note 4 comes with a paper clip (which can be replaced with a regular straight stationery or needle) and don't use toothpicks or matches, because they can break inside the hole.
- Find a slot and press it. Put it in the hole before you click. The tray will extend 2-3 mm — gently pull it with your fingers. Don't put too much effort: if the tray doesn't come out, check if the clip is skewed.
- Install. SIM-Put the SIM in the tray with the contacts down (the golden side should face the back of the phone: 📱 Slot 1 - the main nano-SIM (supports) 4G). 📱 Slot 2 is the second nano-SIM or microSD (but not simultaneously!).
Put the tray back in. Make sure the SIM doesn't protrude beyond the edges. The tray must enter smoothly, without skewing, and if you feel resistance, remove it and check that the installation is correct.
Simka's in the contacts down |
The tray is inserted to the point.|
No foreign objects in the slot |
Phone's off.-->
After turning on the phone, wait for the network icon to appear (usually it takes 10–30 seconds). If the connection does not appear, restart the device or check the settings in the Settings section. → SIM-maps and mobile networks.
💡
If the phone can't see the SIM, try bent its contacts slightly (neatly, without fanaticism) or wipe them with a stripe, sometimes the oxidation of the metal interferes with the stable connection.
Frequent Mistakes and How to Avoid Them
Even with the seemingly simple procedure, users often make mistakes that lead to the breakage of the slot or SIM, the most common of which are:
| Mistake. | Effects of consequences | How to fix it |
|---|---|---|
| Installation of the SIM with contacts upwards | Phone can't see map, possible scratches on contacts | Turn the SIM and reinstall |
| Using a micro-SIM without an adapter | Bad contact, loss of network, damage to slot | Cut to nano-SIM or replace in the cabin |
| Power in tray extraction | Breakdown of the nominating mechanism | Contact the service center |
| Install two SIM + MicroSDs at the same time | The phone doesn't recognize one of the cards. | Select priority: either two SIMKS or SIMK + USB drive |
⚠️ Note: If after installing the SIM, the phone says "No Service" or «SIM-Card not supported, check if the card is activated by the operator, new SIMs require registration on the network (usually takes 1-24 hours).
How to Choose Between the Second SIM-memory-card
The hybrid slot in Redmi Note 4 forces users to choose between two SIMs or one SIM + Memory expansion. Which option would you prefer?
- 📞 Two. SIM-The cards are convenient if you:
- 💾 SIM + MicroSD is good for you if you:
Alternative solution is to use cloud services (Google Photos, Mi Cloud) or OTG-flash drive (through adapter) USB-C). However, it is less convenient than the built-in microSD.
💡
If you switch between two SIMs often, consider using eSIM (a virtual SIM). Unfortunately, the Redmi Note 4 doesn’t support eSIM, but it can be emulated through apps like Airalo (for travel).
What to do if the slot for SIM-card jammed
If the tray doesn't extend after you press it, don't panic.
- Garbage is trapped. Dust or small particles block the mechanism. Try blowing the hole with compressed air (for example, a canister to clean the keyboard).
- If the phone fell, the tray could bend, and carefully tuck it with a thin plastic card (for example, a bank card).
- The spring mechanism breaks down, and you'll need to disassemble the phone, and we don't recommend doing it yourself, but you should go to the service.
⚠️ Attention: If the tray fell out of the slots when extracted, do not try to insert it back by force.This can damage the slot contacts.
In extreme cases, you can temporarily use your phone without a SIM, connecting to the mobile Internet through an access point on another device, but this is inconvenient for calls.
How to check the work SIM-postcard
After installing the SIM, follow a few steps to make sure it works correctly:
- Check the network icon in the status bar (top of the screen) and display the operator name (e.g., MTS or Beeline) and signal level.
- Call another number or send it to the SMS. If the call does not pass, check the settings in Settings → SIM-maps and mobile networks → [yours SIM] → Turn it on.
- Activate the mobile Internet. Go to Settings → SIM-maps and mobile networks → [yours SIM] → Access point (APN) Make sure that the parameters meet the operator’s requirements.
- Check the speed of the Internet with Speedtest, and if the speed is lower than expected, it may be 3G instead of 4G.
If your phone sees a SIM but the internet doesn’t work, try:
- 🔄 Reset the device.
- 📡 Manually select the network in the settings (Settings) → SIM-map → Choice of network).
- 📋 Reset the settings APN (access points) to standard.