Installing a mobile operator card in Xiaomi Redmi Note 7 is one of the first and most important procedures faced by the new smartphone owner. Although the design of the tray may seem standard for the budget segment, there are nuances that ignore can lead to damage to contacts or improper communication. It is important to understand that the Redmi Note 7 model is equipped with a hybrid slot, which imposes certain restrictions on the choice of configuration of memory cards and SIM cards.
In this guide, we will discuss in detail the process of tray extraction, the correct positioning of the chip and network configuration after installation. We will focus on how to avoid common errors that can disrupt the communication module. The correct sequence of actions ensures stable signal reception and long service life of the contact group.
Tools and workplace preparation required
Before you start physically affecting the body of the device, you need to prepare the workspace. The ideal option is a table with good lighting and a level surface. You need a special metal clip that comes with the device, or a thin needle with a strong rod. Use blunt objects such as sewing needles or toothpicks, strongly discouraged, as they may not reach the lock mechanism or break inside the hole.
Make sure your hands are clean and dry, fat, sweat or dust can get on golden contacts SIM-The card or the smartphone itself, which will lead to oxidation and loss of signal. If you are installing a new SIM, make sure it is trimmed to the correct size of the Nano-SIM, as the Redmi Note 7 does not support Mini or Micro formats without special adapters, which in turn can get stuck in the tray.
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If the paper clip is lost, use a paper clip, but straighten it completely so that the end is thin and straight, avoiding the use of thick paper clips that can damage the mechanism.
Definition of type SIM-card-tray
The Redmi Note 7 uses the Nano-SIM format. It's the smallest standard at the moment, and the size confusion is unacceptable here. The device tray is hybrid: it has two positions, one of which (the second) can be used either for the second one or for the second one. SIM-It's either a microSD card or a microSD card, and understanding this design is critical to planning your phone's use.
If you plan to use two SIM cards at once, the memory card slot will be busy, and you will not be able to expand the internal memory of the device. If you are more important storage for photos and videos, you will have to limit yourself to one SIM card. Some users resort to using combined adapters, but this solution is not standard and can lead to jamming of the mechanism or short circuit.
Can adapters be used? SIM-map?
Step-by-step instruction: how to insert SIM-map
The process of installing the card requires accuracy and attention to detail. Find a small circular hole on the lower end of the case located next to the USB Type-C connector. This is where you need to insert the tool to extract the tray. Hold the smartphone firmly, but without undue pressure, so as not to scratch the screen or the back panel.
Insert the paper clip into the hole strictly perpendicular to the body. You should feel a slight click of the spring mechanism, after which the tray will extend outwards. Don't try to pull it out with your nails if it is not completely out - better press the paperclip again, but more confidently. Remove the tray completely and put it on the table face up.
☑️ Installation procedure SIM-map
Look at the tray that's been removed. It has cutouts that are shaped like the Nano-SIM circuit. Usually, the tray itself has a diagram showing which side to lay the chip on, make sure that the cut corner of the card matches the cut corner on the tray, and the contacts of the card should be directed down to the contacts of the phone.
Carefully place the card in the designated area. It should lie flat, not protruding over the edges or wobbling. If the card is crooked, correct it, but do not make any effort. Then insert the tray back into the smartphone. Note: you only need to insert the tray in one position that corresponds to its shape. If you feel resistance, do not press, turn the tray over.
Network settings after installing the map
Once the tray is inserted and you hear the characteristic snap of the fix, you can turn on the smartphone. MIUI You should automatically identify a new SIM-At the top of the screen, you'll see a status bar with the operator's name and signal level, but you don't always automatically adjust, especially when you're using old carrier cards or MVNO.
For manual checks and settings, go to the Settings menu. SIM-Maps and mobile networks. Here you'll see a list of maps installed. If the map is identified but there's no Internet, you may need to enter. APN (This data is usually sent to the SMS from the operator or available on its website.
| Parameter | Description | Where to find out. |
|---|---|---|
| Access Point Name (APN) | Gateway address for Internet access | Operator's website / SMS |
| Type SIM | Selection of preferred network type | Settings SIM-map |
| Mobile Internet | Data switch | Notification curtain |
| Data roaming | Permission of data transfer abroad | Settings SIM-map |
You can also set up which cards will be used for mobile Internet by default and which will be used for calls only, especially if the card plans vary greatly in the cost of traffic, and you can also quickly switch between cards to make a call.
Solution: The phone can't see SIM-map
The situation when after installing the card in the status bar appears the inscription "No" SIM-"Put in the cards" or "Put in" SIM-The map is one of the most common problems. Before you panic, check if the tray is tight. Sometimes it doesn't fully enter the body and the contact doesn't close. Take out the tray and insert it again, making sure it's flush with the body.
The second reason could be contamination of the contacts: wipe the golden pad on the card itself with a soft eraser or cloth soaked in alcohol, also blow out the slot in your phone to remove any possible dust. If you use a hand-cut card, make sure that the trimming is done smoothly and the chip is not damaged.
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If the phone can't see SIM-card, first of all try to insert it into another phone - this will allow you to understand whether the card or smartphone slot itself is faulty.
A software failure can also cause a problem. Try restarting your device. If that doesn't work, go to Settings → Advanced Settings → Location and Security (the path may differ in different versions of MIUI) and check if the system is blocking the communication module. In extreme cases, you can reset your network settings, but this will delete the stored Wi-Fi passwords.
4G/LTE setup and network selection
For comfortable use of a modern smartphone, you need to activate high-speed Internet. SIM-Select the desired SIM card and find the preferred network type. Set the value Preferred LTE or 4G. If you choose 3G or 2G, Internet speed will be much lower.
Sometimes the phone gets stuck on 3G, even if the 4G coverage is great, so you can switch the network mode to the Engineering Menu, but it takes care. The simple way is to turn the RIM on and off for 10 seconds, which will cause the modem to reconnect to the best available tower.
⚠️ Note: If you are in an area with unstable surface 4G, The phone can often switch between standards, which quickly drains the battery. 3G customized.
Don't forget that for work 4G yours SIM-The card must support this standard. 7-8 In the past, they often only work on networks. 2G/3G. You can replace them free of charge in the operator’s cabin, saving your number.
Security and card retrieval
Although modern smartphones support a "hot" replacement SIM-cards (extract when the phone is turned on), experts recommend doing this only in emergency cases. the software may not have time to correctly complete the work with the file system of the card, which will damage it or reset network settings.
If you need to take out the card, you better turn off your phone first, or at least turn off the data and put the device in flight mode. Remove the tray as you put it in -- using a paper clip and pressing the hole. Be careful not to lose the small tray, as it can easily roll under the furniture.
⚠️ Warning: Never try to remove the tray SIM-While the memory card is actively writing data to the memory card (if it is installed in the second slot), this can lead to the loss of photos, contacts and other files.
Keep it. SIM-The card is in a special plastic holder that came with the card, or in a safe place, protected from static electricity and moisture.