Modern smartphones of the Xiaomi brand are famous for their reliability and thoughtful ergonomics, but new users often have questions when first setting up the device. the Redmi 7A model is no exception and requires a careful approach to installing communication modules for proper operation. Incorrectly installing the chip can lead to the fact that the phone will not see the network or will constantly lose the signal at the most inopportune moment.
In this guide, we will discuss the installation process in detail. SIM-You will learn where the slot is, how to safely remove it without damaging the case, and what are the nuances of working with two SIM cards at the same time. Compliance with simple rules will help to avoid mechanical damage and ensure a stable connection from the very first turn on.
Before you start physically affecting the device, you need to prepare the workplace and the tool itself. Despite the apparent simplicity of the procedure, haste often causes contact breaks or scratches on the glossy surface of the smartphone. We will look at each step in as much detail as possible, so that even an inexperienced user can cope with the task without assistance.
Tools and workplace preparation
To successfully install the communication module, you will need a minimum set of devices, which usually comes with a phone. The main tool is a special metal clip that is shaped like a needle, but it is often lost or thrown away with the packaging. Alternatively, you can use a regular stationery clip that needs to be straightened beforehand, or a thin sewing needle, but you should use them with extreme caution.
It is critical to ensure good lighting of the work area, because the tray extraction holes are microscopic in size. The light must fall directly on the end of the device so that you can clearly see the tool's entry point. Trying to perform manipulations in the dark or on weight greatly increases the risk of slipping the needle and damaging the side of the body or, worse, the internal components.
⚠️ Warning: Never use knives, toothpicks or other sharp objects that may break inside the hole to extract the tray. A piece of toothpicking will block the mechanism, and it will be impossible to remove the tray without disassembling the smartphone.
It is recommended to cover the table surface with a soft cloth or put a rubber mat. This will prevent the phone from slipping and protect the screen from scratching if the device accidentally falls or flips over during operation. It is also worth removing the protective case if it is already wearing, since some accessories models tightly fit the ends and block access to the hole.
Slot Location and Types SIM-map
In the Redmi 7A, the SIM slot is located on the top end of the case, which is the standard solution for a budget segent. The tray is combined and supports the installation of two Nano-SIM cards or one Nano-SIM and a microSD memory card. It is important to understand that the device does not support the installation of old-format cards (Mini or Micro), so before starting the procedure, make sure that your SIM card is Nano size.
If your SIM card is larger, don't try to force it or cut it with scissors in your eye. An improperly cropped chip can get stuck in the tray or damage the contact areas inside your phone. You'd better contact your carrier's salon, where you'll be replaced with a Nano card for free or given a combined SIM card with break-out segments.
💡
Use only original or quality combinations SIM-Cheap adapters can have increased thickness, which will lead to jamming of the tray inside the case.
The design of the tray in Xiaomi Redmi 7A involves two separate cells for SIM cards located on opposite sides of the central lintel. Each cell has its own set of contacts and locks. When installed, you must strictly observe the orientation of the chip, since an inverted card will simply not stand in the slots, and excessive pressure can damage it.
Step-by-step instructions for removing the tray
The process of extracting the tray requires precision and precision to enter the opening of the mechanism. Take a tool (a paper clip or a needle) and place it perpendicular to the end of the smartphone. Find a small circular hole next to the elongated tray, which is the one you need to press.
☑️ Pre-extraction check
In a smooth but steady motion, press the paperclip until the characteristic click. The tray should extend out of the case by a few millimeters, after which it can be carefully pulled with your fingers. Don't make excessive efforts: if the tray does not come out, you may not have pressed the mechanism deeply enough or chosen the wrong hole.
Once removed, inspect the tray: it has an asymmetrical shape, which eliminates the possibility of improper installation back into the phone. One side usually has a place for a memory card, and on the other side is a SIM card, or two cells for SIM cards depending on the regional version of the device. In the Redmi 7A model, the most common option is the two slots for Nano-SIM.
Proper installation of SIM-card in the tray
Putting the card in the tray is the most important step, requiring attention to detail. Put the tray on a flat surface and take the SIM card. Pay attention to the cut angle: it should match perfectly the shape of the notch in the tray. If the angle does not match, the map should be turned over.
The SIM card contact area (golden contacts) should be pointed upwards, towards you.This is standard position for most Xiaomi smartphones. Make sure the card fits tightly to the bottom of the cell and doesn't protrude beyond the edge of the tray. If the card is set correctly, it will hold on to light friction and won't stagger.
What to do if the card is not fixed?
When using two SIM cards, fill both cells if necessary. Remember that in Redmi 7A slots can have different priorities: the first slot usually supports higher 4G/LTE speeds, and the second can operate in 2G/3G mode while both cards are active simultaneously. Distribute cards accordingly if mobile Internet speed is important to you.
| Parameter | Slot 1 (top) | Slot 2 (bottom) |
|---|---|---|
| Type of card | Nano-SIM | Nano-SIM |
| 4G support | Yes (main) | Yes (with one active) |
| Contacts up | Yes. | Yes. |
| Compatibility with SD | No (separate slot) | No (separate slot) |
Inserting the tray back into the smartphone
Once the cards are successfully placed in the tray, you need to return it to the device body. Take the tray by the edges, trying not to touch the gold contacts with your fingers, as fat and dust can impair the connection. Orient the tray so that its shape matches the hole in the phone.
Carefully insert the tray into the guides to the point. You should feel a slight resistance of the spring mechanism at the end of the path. Do not use force: if the tray does not enter, check its orientation. An incorrectly inverted tray can damage the contacts inside the phone when you try to push it.
⚠️ Attention: The tray must enter the body strictly horizontally and without skewing. If you feel that one side enters easier than the other, stop and align the position so as not to break the plastic guides inside.
Once the tray is fully recessed, you can turn on the smartphone, the system automatically detects a new SIM card and tries to adjust the network settings, and if the device is unlocked, the signal level indicator and the name of the carrier will appear on the screen in the upper corner.
Network setting and elimination
After physical installation of the card, you may need to program settings. Go to the Settings menu, select About phone or SIM-Maps and mobile networks, and you can assign which card will be used for default voice calls and which for mobile Internet.
In some cases, especially when using old carrier cards or regional tariffs, manual configuration of APN access points is required. This data usually comes in the form of SMS from the operator, but it can be entered manually in the appropriate settings section. Xiaomi often requires you to specify the IPv4/IPv6 protocol type for stable 4G operation.
If the phone says "No SIM card" or "Emergency calls only," try rebooting the device. In rare cases, it helps to retrieve and re-installe the card with a thorough soft wipe of contacts. Also make sure that the card is active and there are funds in the account, since some operators block outgoing connections at zero balance, leaving only incoming ones.