Owners of the Xiaomi Redmi 7 smartphone, released in 2019, often wonder about the possibility of using multiple numbers at once.This device, despite its age, remains popular due to its reliability and affordable price, but the nuances of its hardware require careful study. Many users confuse the number of supported networks with the physical number of slots, which leads to unreasonable expectations or problems when buying a second SIM card.
In this article, we will discuss in detail how many sims in the Xiaomi Redmi 7 can be used, what frequency restrictions are in place and how to properly configure the device to work in hybrid mode. Understanding these features will help you avoid loss of communication and optimize the mobile Internet.
The answer to the question of the number of cards depends not only on the user’s desire, but also on the specific modification of the device purchased in your region.The global version and the version for the Chinese market may have differences in the layout of the tray, which is critically important to consider when buying.
The hardware capabilities of the tray for SIM-map
The physical tray in Redmi 7 is Nano-SIM and has a specific design. In the standard global version, the smartphone features two full-fledged slots for Nano-SIM cards, which allows you to use two different numbers simultaneously without using adapters. However, there is a nuance with memory: in some configurations, one of the slots is hybrid.
A hybrid slot means that you can install either a second slot. SIM-Simultaneous use of two SIMs and a memory card is impossible in this case, unless you use specific adapters that are not recommended by the manufacturer due to the risk of damage to the contacts. The technical characteristics of the device clearly regulate this possibility, and ignoring them can lead to the inoperability of the communication module.
⚠️ Warning: Before removing the tray, be sure to turn off the phone. Although modern smartphones often support hot replacement, it is safer for the Redmi 7, with its age and type of power controller, to turn off the device to avoid short circuits or resetting network settings.
To remove the tray, a special paper clip is used, which is included in the kit, or a thin needle. The hole is located on the lower end of the case, next to the Micro-USB connector. It is important to insert the tool perpendicularly so as not to damage the internal locking mechanisms.
📊 What kind of guy. SIM-You use the cards most often?
Nano-SIM (standard)
Micro-SIM (old format)
Standard-SIM (large)
eSIM (virtual)
Support for 2G, 3G and 4G LTE networks
The question of how many sims in the shiaomi redmi 7 can run at high speed requires clarification. 4G LTE, But the mode of operation depends on which card is the main card. SIM-The card can work 4G, The second one will be on the network. 2G or 3G.
Switching between cards to access high-speed Internet is done via a software menu, which means you can't download files from two numbers at maximum speed at the same time, but you can take calls to both numbers without interrupting the main card's Internet connection. VoLTE (Voice over LTE) is also supported, but it depends on the carrier.
- 📶 Basic SIM-The map can work on networks 4G/3G/2G.
- 📞 Secondary SIM-The card is usually limited to networks 2G/3G active 4G first.
- 🔄 Switching the Internet between cards occurs without restarting the device.
- 🌐 Frequency support depends on the regional version of the firmware (Global, CN, EU).
It's worth noting that in some regions, operators are turning off 2G networks, which can create problems with receiving a signal on a second card if it doesn't support 3G or 4G in your area.
Instructions: How to install two SIM-map
The process of installing two SIM cards in Xiaomi Redmi 7 is quite simple, but requires care. First, you need to find a clip in the kit or pick up a thin metal object. Then, after making sure that the phone is turned off, press a clip into the tray hole and remove it.
Place the cards in the appropriate recesses of the tray. Notice the bevelled corner of the card, it should match the pattern on the tray. SIM-The card does not need to be installed, instead of it, a microSD is inserted.
Once installed, carefully insert the tray back into the case before clicking. Turn on the device. The system automatically detects new cards and prompts them to be set up. If that doesn't happen, manually navigate to the settings through the Settings menu. → SIM-maps and mobile networks.
What to do if your phone can’t see SIM-map?
If Redmi 7 doesn't detect a SIM card after you turn on, try to wipe the contacts with a soft eraser. Sometimes oxidation or dust interferes with the connection. Also check if the card is tight in the tray - it should not hang around. If the problem persists, check the card on another phone to ensure it doesn't malfunction. Set call priorities and Internet After the physical installation, it's important to set the numbers correctly. MIUI (Xiaomi's shell is flexible, so you can assign one card to default voice calls and the other card to default voice calls. SMS You can either use the Internet or leave a choice every time you call. → SIM-And you can see the list of maps installed here, and you can click on the name of the operator, and you can prioritize it. For example, for card 1 you can select "Always ask" and for card 2 you can select "Use for default calls". ⚠️ Note: When the Always Ask feature is enabled for outgoing calls, the operator selection screen will appear every time you dial.This can be inconvenient in emergency situations, so it is better to set up the main card for default calls. Special attention should be paid to the setting of the mobile Internet (APN) The second card may not be automatically determined, especially if it is a virtual operator, in which case you need to enter the parameters manually, taking them from the provider's website. SIM-Redmi 7 has its pros and cons compared to the mode of a single card, the main advantage is the separation of personal and work space or the use of advantageous tariffs of different operators. But there are technical limitations. SIM-The card may experience increased battery consumption, as the radio module must communicate with two towers simultaneously, and in areas of uncertain reception, the signal can "float" more often than using a single card. SIM-card SIM-Autonomy High (standard) Reduced by 10-15% Internet speed maximum (4G) 4G one-on-one, 2G/3G Second Heating of the case Minimum Moderate Heating Possible Convenience One Number Two rooms in one case If you do not use the second number constantly, it is wiser to turn off the second number SIM-The card is software-based through settings to save battery life, and this is done in the same menu where priority is selected. 💡The main conclusion is that the use of two SIM-The cards in Redmi 7 are fully functional, but require an understanding of the limitations of the hybrid slot and the possible impact on battery life.Frequent problems and ways to solve them Xiaomi Redmi 7 users may face a number of typical problems when using two SIM cards. One of the most common is that the network disappears on one of the cards after a system update or spontaneous restart, often solved by resetting the network settings. → Connection and sharing → Reset Wi-Fi, mobile network and Bluetooth.Please note that this action will remove saved Wi-Fi and Bluetooth device passwords, but return network settings to factory values. 🔧 Check if the tray is damaged for SIM-map. 📱 Make sure the latest version is installed. MIUI. 🌐 Manually select the network operator in the settings of the mobile network. 🔄 Perform a reset settings APN If the problem is hardware (e.g., the phone only sees one card, although both are working and work on other phones), it may be necessary to clean the contacts inside the slot or replace the module itself. ⚠️ Note: Do not use metal objects to clean the slot’s internal contacts SIM-This can lead to short circuits, only use a dry soft brush or compressed air, and it's also worth mentioning the problem of identifying the operator's name. Sometimes instead of the company name, a code is displayed (for example, a code is displayed,"250-01"). This is not a critical error, but only a feature of the firmware or database, and the quality of communication does not affect the quality of the connection. The Xiaomi Redmi 7 smartphone remains a reliable communication tool, it is able to serve for years to serve faith and truth. Understanding how many sims in the Xiaomi Redmi 7 can be used effectively, allows you to unlock the full potential of the device. Regularly check system updates, as Xiaomi periodically releases patches that improve the stability of the modem. Do not overheat the device, leaving it in the sun or near heating devices, since high temperature negatively affects the operation of the radio module and the plastic case. Remember that careful attitude to the tray and contacts - you can rarely use the three-models from the last connection, if you do not use the device with the red card with the upper tray? No, the Redmi 7 hardware supports a maximum of two physical SIM-cards or one SIM + MicroSD) Triple SIM adapters are not possible because of the design limitations of the tray and the lack of a third channel in the modem. 4G? In most Redmi 7 configurations, only one radio module supports high-speed networks. 4G. The second card is forced to switch to mode 2G or 3G This is the standard limit for smartphones of this class and year of release. How do I know if my Redmi 7 VoLTE supports? VoLTE depends on the combination of firmware and operator. Check for a switch. LTE" Settings menu → SIM-maps and mobile networks → (If you don't have a switch, you may not have a CVC certified to work with this model. What if you lose the speaker sound when you call? It could be a software glitch. Try turning on and off speakerphones. If it doesn't work, check if the speaker hole is covered with a cover or dirt. In rare cases, you need to reset or flash it.