Installing a carrier card is the first and most important step after buying a new smartphone. Owners of the popular Xiaomi Redmi 7 model often face the question of how to properly remove the tray and place a chip in it so that the device immediately starts working with the network. Despite the apparent simplicity of the process, there are nuances in the design of this budget gadget, ignoring which can damage the slot or the card itself.
In this article, we will discuss the installation process in detail. SIM-It is important to understand that the Redmi 7 model is a hybrid slot device, which requires the user to be careful when choosing the configuration of memory and communication cards. We will also look at common mistakes that can be easily avoided if you know the technical features of the design.
Incorrect installation can cause the phone to stop seeing the network or constantly lose signal. Therefore, before you start manipulating, we strongly advise you to read the instructions completely so as not to damage the mechanical elements of the case. Your smartphone will last longer if you take care of its hardware components.
⚠️ Warning: Before removing the tray, be sure to turn off the device. Although modern smartphones support hot replacement, in the Redmi 7 model, this can cause a software failure of the communication module or short-term closure of contacts.
Preparation of the workplace and necessary tools
Before you start physically affecting your smartphone, you need to prepare your workspace, you need a flat, well-lit surface, so that small parts like the paper clip or the SIM card itself don't get lost, and the ideal option is a soft-coated table or a special antistatic mat that protects electronics from static electricity.
The main tool for retrieving the tray is a special metal clip that comes with a Xiaomi smartphone. If the original paper clip is lost, you can use a regular stationery clip by straightening one of its ends, or a thin needle. The main requirement for the tool is that it must be thin enough to enter the hole, but strong enough not to bend when pressed.
- 🔧 Special paper clip for extracting the tray (comes complete).
- 💡 Bright light source for a good overview of small details.
- 🧼 Microfiber wiper for cleaning card contacts.
- 📱 Same thing. SIM-The correct format card (Nano-SIM).
Also make sure your hands are dry and clean. Fat marks or moisture can worsen contact between the chip and the reader in the future.If you work in a room with low humidity, it is recommended to touch the metal object beforehand to remove static charge from the body.
💡
Use a magnifying glass or smartphone camera in macro mode if you have poor vision to clearly see the direction of the slice on the SIM card.
Features of the design of the Redmi 7 tray
The Redmi 7 is equipped with a combined slot, which is an important technical nuance, which means that the second compartment in the tray can be used either for the second one. SIM-It is impossible to use two SIM cards and a memory card simultaneously - you will have to choose between the expansion of memory and the second "Sim".
The tray in this model is a solid metal frame with a plastic insert. It is located on the bottom end of the device, to the right of the USB Type-C connector (this model uses Micro-USB, which is also worth considering when orientation). The extraction hole is circular and is directly next to the slot.
Inside the tray, you'll notice two notches of different sizes: a larger notch is for a memory card or a second SIM card, and a smaller, often with a distinctive bevelled angle, is for the main notch. SIM-It's important not to confuse them, because putting a larger map in a smaller compartment is physically impossible, but trying to stuff a card in an inappropriate format can break the plastic guides.
⚠️ Warning: The tray has only one correct position to fit into the case. Do not try to insert it by force or the other side - this will cause the locking mechanism inside the smartphone to break.
What is a hybrid slot?
Step-by-step instructions for extraction and installation
The installation process begins by finding a hole to extract the tray on the bottom end of the body. Place the tip of the clip or needle perpendicular to the surface of the hole. Press with moderate force until a characteristic click - the tray should be extended several millimeters, after which it can be carefully removed with your fingers.
Put the extracted tray on the table and take yours. SIM-Make sure it has Nano-SIM format, as this is the standard that supports the Xiaomi Redmi 7. If your card is larger, it should be replaced by a carrier or gently trimmed along the circuit using a special stencil, although the latter method is not recommended due to the risk of damaging the chip.
Place the card in the appropriate indentation of the tray. The golden contacts should look upwards, and the bevelled corner of the card should coincide with the bevelled angle of the notch in the tray. The card should lie tightly, without staggering, and then carefully insert the tray back into the smartphone case before clicking.
☑️ Installation verification SIM
Once installed, turn on the device. If done correctly, signal level indicators and operator designation will appear at the top of the screen. PIN-code, if it has been previously installed.
Network setting and choice of mode of operation
After the physical installation of the card, you need to check the software settings. MIUI, The one installed on Redmi 7 offers flexible settings to manage two SIM cards. Go to Settings menu, then select the option SIM-maps and mobile networks.
Here you can assign which card will be used for mobile internet and which for default voice calls, which is especially useful if you have a tariff with a large packet of traffic on one SIM and unlimited minutes on the other, and in this section you can turn on or off a specific card without physical extraction.
| Parameter | Description | Recommended value |
|---|---|---|
| Mobile Internet | Selecting SIM for Data Transfer | High traffic map |
| Voice calls | The main card for calls | Cheap minutes map |
| SMS default | Message map | By choice of the user |
| Type of network | Preferred communication standard | 4G (LTE) is preferably |
It is important to make sure that 4G or LTE mode is enabled for maximum data rate. From the mobile network settings menu, select "Preferred Network Type" and set "LTE" value. If the network is not catching, try restarting the device after changing the settings.
Typical problems and methods of their solution
Sometimes users are faced with a situation where after installation, the card is not identified. First of all, check if it is inserted correctly. Even a millimeter shift can disrupt the contact. Try to remove the tray, wipe the contacts of the SIM card with dry cloth and insert it again, making sure that it fits tightly.
If the phone says "No Service" or "Emergency Calls Only," check if the service is activated from the operator, and the problem may be the settings of the APN hotspot, which are usually set automatically, but if necessary, you can enter the settings manually, obtaining data on the operator's website or in its application.
- 📶 Check if it's blocked. SIM-mapper.
- 🔄 Perform a smartphone reboot after installation.
- 🔍 Make sure the tray is inserted