Many users switching to budget, but powerful smartphones, often face an incomprehensible design of the tray for cards. Model Redmi Note 7 has become a real hit sales thanks to a great screen and camera, but its tray for the first time. SIM-The cards have their own features that can be confusing to the beginner. Unlike the older models, it uses a combined slot that requires care when installing.
Incorrect installation can cause the phone to fail to see the network, or, in the worst case, damage the contacts of the device itself. In this article, we will discuss in detail how to correctly install two SIM cards, what nuances the combined tray has, and how to set the priority of Internet and calls in the MIUI system.
Features of the design of the tray in Redmi Note 7
The first thing to know before starting the procedure is that the Xiaomi Redmi Note 7 uses a hybrid slot format Nano-SIM. This means that physically in the tray there is room for only one microSD card and one memory card. SIM, or SIM-It's designed to be tight and dust-resistant, so you need to carefully remove it.
It is important to understand that both SIM card slots support 4G LTE, but they cannot work simultaneously in high-speed mode. Usually one card works in 4G mode, and the second switches to 2G or 3G for receiving calls and SMS. This is standard practice for most modern smartphones, but it requires the correct configuration after installation.
The card-fixing mechanism in the tray is spring-loaded, which allows for tight contact with the pins inside the smartphone. If you feel that the card is not entering the end or dangling, then it is not located correctly. Do not use excessive force, because the plastic tray, although strong, at the wrong angle of the insert can crack.
⚠️ Warning: Before removing the tray, it is strongly recommended to turn off the device. Although modern smartphones support hot replacement, in rare cases the system may not recognize the second card without rebooting, and in the worst case, a short-term voltage surge is possible.
Tools and training required
You don't need a sophisticated technical arsenal to be installed successfully. The main tool is a special paper clip that comes with a smartphone box. If the original paper clip is lost, you can use a thin needle or pin, but be careful not to prick your finger and damage the hole mechanism.
Make sure yours are yours. SIM-If your cards were hand-cut from Micro-SIM or Standard, the edges may be uneven, making it difficult to install, and if you have a Nano-SIM card, it is the smallest standard to date.
- 📱 Xiaomi Redmi Note 7 with the screen off.
- 🔑 Paperclip to remove tray (or thin needle).
- 💳 Two active SIM-Nano-SIM maps.
- 🧻 Dry soft fabric for wiping contacts (if necessary).
It is also worthwhile to determine in advance which SIM card will be the main one for the mobile Internet. In MIUI (the shell of Xiaomi), you can flexibly adjust priorities, but physically the cards in the slots are equivalent. However, if one of the cards is significantly older or has damage to contacts, it is better to install it in the second slot for testing.
Step-by-step instructions for installing two SIM-map
The installation process is pretty simple, if you know where to look. On the bottom end of the smartphone, to the left of the USB Type-C connector, you'll see an oblong hole. That's where you put the tool in. Hold the smartphone firmly, resting your thumb against the back cover, so you don't drop it when you're extracting it.
Push the paperclip into the hole perpendicular to the case and press before you click. The tray will push itself. Pay attention to its shape: on one side it has a notch under the card, and on the other it has a platform. In Redmi Note 7, the tray is two-sided or has a special frame that allows you to place two cards on top of each other or next to each other, depending on the revision of the board, but most often the method of stacking one card on top of the other in the same plane or using a specific holder.
☑️ Pre-installing check
Take the first one. SIM-a map and put it in a tray so that the beveled corner coincides with the pattern on the tray. Then, depending on the design of your particular tray (they may vary slightly in different batches), the second card should either be placed in a separate compartment or use a special adapter frame, if it is provided. In the classic version of Redmi Note 7 tray allows you to install two Nano-SIM side by side.
Carefully insert the tray back into the smartphone. It's important not to confuse the sides: the tray enters only one side. If you feel resistance, do not press, turn the tray over. It must enter smoothly and completely, equal to the body.
⚠️ Warning: Never insert a tray unless it contains cards, or if the cards protrude outside the tray, which can lead to jamming of the mechanism inside the case and damage to the motherboard contact group.
Set up network and priorities in MIUI
After switching on the smartphone, the system will automatically detect two new ones. SIM-You'll see two signal level scales in the status bar, but for a comfortable experience, you need to configure which card to use for calls and which card to use for data. → SIM-maps and mobile networks.
In the menu that opens, you'll see a list of cards that you've installed, and you can give them names that you can understand, like "Work" and "Personal," and you can pick different call melodies for each one, which is very convenient because you can immediately know which number you're calling without taking your phone out of your pocket.
| Parameter | Description | Recommendation |
|---|---|---|
| Default calls | Map from which outgoing calls will be made | Choose a fare with cheap minutes |
| Mobile Internet | Map through which data traffic is carried | Choose a card with a large package GB |
| SMS reception | What number do confirmation codes arrive at? | Leave the main (banking) |
The "Use 4G" option is worth a special note. Some firmware versions manually select which slot will work in LTE mode. If you don't choose a 4G card, both can work in 3G mode, which will significantly reduce Internet speed. Make sure that the main card has a preference for LTE.
Solving Typical Problems with Card Definition
Sometimes it happens that after installation, the second SIM is not identified. First of all, check if it is inserted correctly. The contacts must be directed downwards (to the board), and the bevelled angle must match the pattern. Dust or fat from the fingers on the contacts can also cause a bad connection.
If everything is physically OK, try software resetting network settings. Go to Settings → SIM-maps and mobile networks → (select a map) → Network type and switch from 4G on 2G, then back to 4G. This will force the modem to re-register in the operator’s network.
What to do if you write "No" SIM-map"?
Another reason may be the blocking of IMEI. If the smartphone was bought from hand or brought from another country, make sure that it is not on the blacklist of operators. IMEI device.
Use of one SIM and memory card
Since the slot in Redmi Note 7 is hybrid, you may be faced with a choice: two SIMs or one SIM plus a microSD card. If you do not need a second SIM card, you can safely use the slot to expand the memory to 256 GB. This is true for those who shoot a lot of high-resolution video.
When installing a memory card, the algorithm of actions is the same: remove the tray, remove one SIM-In its place (or on top, depending on the design of the holder) put a microSD. The system automatically rebuilds the file system and suggests using the card as internal storage or as a portable media.
It is worth noting that when using a memory card in a hybrid slot, the Dual SIM function becomes physically unavailable, you will have to choose which is more important for you: constant contact on two numbers or a large amount of memory for photos and music.
Remember that the memory card, as well as SIM-The card is a sensitive item. Do not remove it while you are writing data or reading files to avoid losing information. Always use the Safe Retrieval feature in the settings or simply turn off your phone before changing the card.