Xiaomi Redmi 4 is one of the most popular budget smartphones of the brand, released in 2016. Despite its age, the device is still actively used due to the reliability and ability to install custom firmware. SIM-maps: where is the slot, how to insert the SIM correctly, why the phone can't see it? In this article, an extended manual with visual cues, compatibility tables and solutions to typical problems.
It is important to note that Redmi 4 It was released in several versions: the standard version with one slot under SIM + microSD and Redmi 4 Pro/Prime hybrid-slot (2 SIM or 1 SIM + We will discuss both options in detail, and also tell you how to avoid damaging contacts during installation. If you are first encountering Xiaomi, we suggest you read the article to the end - the last section contains answers to frequent questions that save hours of search for solutions.
Preparation: What you will need before installation SIM-map
Before you start the installation, make sure you have everything you need.
- 📱 Xiaomi Redmi 4 (off!) You can't insert SIM-card to a working device – this can cause system failure or damage to contacts.
- 🪨 A paper clip or a special key to remove the tray (company with the phone) will work for any thin metal part, such as an unbended stationery clip.
- 📇 Nano-SIM (size) 12.3 × 8.8 If you have a regular SIM Or micro-SIM, it needs to be trimmed or replaced in the cabin. 4 Micro-SIM is not supported without an adapter – only nano-format!
- 🔍 A magnifying glass or flashlight (optional) will help you see the small details of the slot, especially if you are a beginner.
Also prepare the workplace: put the phone on a soft surface (like a towel) to avoid scratching the case.If you use a hybrid slot (in Redmi) 4 Pro/Prime), Decide what is more important: the second SIM-a card or a memory card, simultaneously installing 2 SIM + MicroSD cannot be used, you have to choose.
Where is the slot for SIM-Maps in Xiaomi Redmi 4
Xiaomi Redmi 4 slot for the game SIM-The map is located on the left end of the body (when you look at the screen with the face), it is easy to recognize from the small hole for the extraction of the tray.
In order not to confuse the slot with other connectors (for example, with microUSB or 3.5 mm for headphones), focus on the following features:
- 📍 Location: approximately in the middle of the left face, closer to the upper edge.
- 🔍 Visually: there are no other connectors nearby, only one single hole.
- 📏 Size: slit wide ~1 mm, length ~3 mm.
If you're not sure you've found the right hole, compare it to the photo below (or watch the video at the end of the article).In Redmi 4 Pro/Prime, the slot looks identical but supports a hybrid format.
Photo slot for SIM-maps in Redmi 4
Step-by-step instruction: how to insert SIM-map in Redmi 4
Now, to the process itself, follow the instructions strictly to avoid errors.
- Turn off the phone. Press and hold the power button, then select Turn off. Wait for the screen to turn off completely.
- Find the slot (as described in the previous section) and insert the paper clip into the hole to extract the tray. Press with force until the tray is extended by 2-3 mm.
- Take the tray out with your fingers carefully. Don't pull the paperclip, it can damage the mechanism. The tray should come out smoothly, without jamming.
- Put it down. SIM-card-tray: 📱 For Redmi. 4 standard: only one SIM (nano-SIM) in the upper slot. 📱 For Redmi. 4 Pro/Prime: Upper groove — SIM 1 (nano-SIM. Lower groove — SIM 2 (nano-SIM or microSD (but not simultaneously!).
Make sure the map is lying correctly.
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-Next, go to the section “What to do if Redmi 4 does not recognize the SIM card».
⚠️ Attention: Never insert SIM-A card with an adapter (e.g., a micro-SIM in a nano-SIM adapter) will cause the contacts to close and may disable the communication module. If you only have a micro-SIM, cut it to a nano-format or replace it in the cabin of the operator.
Table: compatibility SIM-Slots and cards in Redmi 4
To avoid confusion, we have compiled data on all Redmi 4 modifications in one table, and note the Slot Type column, which is a key setting when choosing a configuration.
| Model | Slot type | Support for SIM | Support for microSD support | Max, the volume of microSD |
|---|---|---|---|---|
| Redmi 4 (standard) | Normal. | 1 × nano-SIM | Yeah (separate slot) | up to 256GB |
| Redmi 4 Pro | Hybrid | 2×nano-SIM or 1×nano-SIM + microSD | Yes (instead of SIM 2) | up to 256GB |
| Redmi 4 Prime | Hybrid | 2×nano-SIM or 1×nano-SIM + microSD | Yes (instead of SIM 2) | up to 256GB |
| Redmi 4A | Normal. | 2 × nano-SIM | Yeah (separate slot) | up to 256GB |
The table shows that only Redmi 4 Pro/Prime They have a hybrid slot. If you need two. SIM-MicroSD and cards at the same time, consider switching to Redmi 4A or newer Xiaomi models with separate slots.
What to do if Redmi 4 doesn’t see it SIM-map
If the phone does not recognize after installation SIM-So, in 90 percent of cases, the problem is solved by simple actions:
- Correct installation: 🔄 Pull out the tray and reinstall SIM-Make sure the contacts (the golden part) look down. 📏 Check if the card has moved in the tray. It should fit tightly to the stops.
- Status. SIM-map: 🔍 Check the contacts for scratches or oxidation, and wipe them with a swallow if necessary. 📶 Try inserting. SIM If it doesn't work, ask the operator for a replacement.
- Phone settings: 📱 Go to Settings. → SIM-Maps and mobile networks and check if it is enabled SIM. 🔄 Select the network manually: Settings → SIM-map → [yours SIM] → Network type (recommended) 4G).
- Programmatic failures: 🔄 Reboot the phone. 📲 Reset network settings: Settings → System system → Reset → Resetting network settings.
Hardware problems
- 🛠️ Check the slot for debris or deformation. if necessary, gently clean it with compressed air.
- 📡 If nothing works, the communications module may be damaged.
- Save the settings and restart the phone.
Note: If you insert a microSD instead of a second one SIM, piece SIM 2 automatically shuts down. To get it back, you have to physically replace the memory card with a memory card. SIM-map.
💡
At Redmi. 4 Pro/Prime You can not use two at the same time SIM-I'll have to choose between the other card and the memory card. SIM microSD.
Frequent Mistakes and How to Avoid Them
Even experienced users sometimes make mistakes when installing SIM-Here are the most common ones and how to prevent them:
- 🚫 Put it in. SIM-This can cause system failure or damage to contacts. Always turn off the device before installing it.
- 🔄 They use micro-SIM adapters. Redmi 4 only supports nano-SIM.
- 💥 They use force when you install the tray. If the tray doesn't come in easily, it means, SIM-The card is set incorrectly. Don't push -- check the position of the card.
- 📵 Not clearing the contacts. SIM-Oxidation or dirt on the contacts can lead to a bad signal.
- 🔋 They don't reboot the phone after installation, sometimes to activate it. SIM Reboot is required, especially after the software update.
If you've made one of these mistakes, don't get upset. Most of the time, the effects are reversible. For example, if your phone stopped seeing SIM after using the adapter, try to clean the slot's contacts with alcohol and insert the correct nano-SIM.