Xiaomi Redmi 7 is one of the most popular budget smartphones of the brand, Released in 2019. Despite its age, the model is still in demand due to its balanced characteristics and low price. SIM-If it's a two-sim device, if it supports three cards, if it requires you to sacrifice a flash drive slot, in this article we'll go through all the nuances, from technical specifications to practical tips for using the card.
The main question is that Redmi 7 supports 2 nano-SIM cards at once, but there are pitfalls associated with hybrid slot and memory card compatibility. SIM-So you have to choose between cards and microSD, and then we'll explain why, how to get around the restrictions, and what to consider when buying.
Official Features: What Xiaomi Says
According to the manufacturer, Xiaomi Redmi 7 is equipped with a hybrid slot for cards, which means that physically in the smartphone there are two connectors, but they work on the principle of βeither-orβ:
- π± Option 1: 2 nano-SIM + no microSD
- πΎ Option 2: 1 nano-SIM + 1 microSD
This scheme is typical for budget models Xiaomi of the period. the manufacturer saves space inside the case, combining the slot for the second. SIM-Important: Redmi 7 can't use two cards at the same time. SIM-MicroSD and cards are a key limitation of the model.
The table below is the official data from Xiaomi specifications:
| Parameter | Meaning |
|---|---|
| Type SIM-map | nano-SIM (4FF) |
| Number of SIM-map | 2 (hybrid slot) |
| Support for microSD support | Yes, up to 512GB (instead of the 2nd SIM) |
| Communication standards | 4G LTE, 3G, 2G |
| Dual VoLTE | No (only one SIM on 4G) |
Pay attention to the Dual VoLTE option, even if you use two. SIM-maps simultaneously online 4G The second card will automatically switch to the second card. 3G or 2G. This is a hardware limitation, it cannot be circumvented by software.
Hybrid Slots: How It Works in Practice
The hybrid slot in Redmi 7 is a trade-off between functionality and compactness, so let's look at how it works physically and what the nuances are when you install cards.
In the card tray (it is extracted using a paper clip through a hole on the left end of the smartphone) there are two sockets:
- Slot 1: nano-SIM only (supports 4G/3G/2G).
- Slot 2: Hybrid β either second nano-SIM or microSD (up to 512 GB).
If you insert a memory card into slot 2, then the second SIM-The card will automatically turn off, and vice versa. The switch occurs without rebooting, but requires the physical removal of the tray.
β οΈ Warning: Do not try to insert a microSD into slot 1 - this will damage the contacts. SIM-map!
To check which cards are currently recognized:
- Go to Settings. β SIM-maps and mobile networks.
- In the SIM-card management section, active cards will be displayed.
- If the memory card is installed, a paragraph will appear in the Memory section. SD-map.
βοΈ Checking the installation of cards in Redmi 7
Can we use two? SIM-MicroSD cards and microSD cards simultaneously?
Unfortunately, no. The Redmi 7's design doesn't allow two to be fitted. SIM-It's a hardware constraint that you can't get around without modifications:
- π Partial solution: Use Google Drive (Mi Cloud) to store files instead of microSD.
- πΆ Alternative: Buy OTG-adapter USB (support OTG firmware).
- βοΈ Radical method: Replace one of the SIM-eSIM cards (but Redmi 7 doesn't support eSIM hardware).
If you are critically important, two SIM-cards, and additional memory, consider models with dedicated slots, such as the Redmi Note 8 Pro or newer Xiaomi devices.
It is also important to note that microSD is used instead of the second. SIM-Cards, some functions may not work smoothly:
- π Calls through the second SIM will not be available.
- πΆ Mobile Internet will only work through the first SIM.
- π Some applications (such as banking) may block work on devices with an unlocked bootloader if you have tried to modify the firmware to bypass restrictions.
π‘
If you need to switch between the two often SIM-With cards and microSD, buy a second card tray and store it with an alternate configuration. SIM-with cards, and the second with one SIM You can switch between them in 10 seconds.
Support 4G: How it works with two SIM-map
One of the frequent complaints of Redmi 7 users is the work of the network. 4G using two SIM-The thing is, the smartphone doesn't support Dual VoLTE. That means:
- πΆ Only one. SIM-The card can work on the network 4G (LTE).
- π Second second SIM-the card will be used 3G or 2G for calls and the Internet.
- π When you're calling on one. SIM The second is temporarily disconnected from the network.
The default smartphone assigns 4G first SIM-card (slot 1) to change priority:
- Go to Settings. β SIM-maps and mobile networks.
- Choose. SIM-map for which you want to include 4G.
- Activate the option to Use 4G (or Preferred Network Type: 4G).
If you need both of them SIM-maps worked 4G, You have to choose between them manually. There's no automatic switching. Also, if you have an active Internet connection, you have to choose between them. SIM The second may temporarily lose contact.
β οΈ Note: If you use the mobile internet SIM-card in slot 2 (hybrid), speed may be lower due to hardware limitations. 4G It is recommended to establish the main SIM-slot-card.
Compatibility with operators: which SIM-maps work
Xiaomi Redmi 7 supports most communication standards, but there are nuances with some carriers.
- π Frequency support: 4G (Bands 1/3/5/7/8/20/38/40), 3G (Bands 1/2/5/8), 2G (Bands 2/3/5/8).
- π‘ VoLTE: Supported but only on one SIM-map.
- π ViLTE (Video Calls): Depends on the firmware and operator.
In Russia and CIS countries, the smartphone is fully compatible with:
- π·πΊ MTS, Beeline, MegaFon, Tele2, Yota, Tinkoff Mobile.
- πΊπ¦ Kyivstar, Vodafone, Lifecell (Ukraine).
- π°πΏ Beeline, Tele2, Altel (Kazakhstan).
Problems can arise with:
- πΊπΈ Some U.S. regional operators (such as Verizon) due to lack of support CDMA.
- π―π΅ Operators in Japan (Docomo, SoftBank) β require manual configuration APN.
If your smartphone is not catching the network, check:
- Correct installation SIM-Cards (contacts should be clean).
- Settings APN In Settings β SIM-maps and mobile networks β Access points (APN).
- Update the firmware (sometimes operators require fresh versions of the software for correct operation).
How to check for 4G support for your carrier?
Frequent problems and their solutions
In the case of two SIM-Redmi 7's maps are the typical problems that people face. Here are the most common and the ways to solve them:
| Problem. | Possible cause | Decision |
|---|---|---|
| It's not recognized second. SIM-map | Incorrect installation, contamination of contacts | Remove and insert the card again, wipe the contacts with alcohol |
| No 4G network on the second SIM | Limitation of Dual VoLTE | Switch 4G to the first SIM or use 3G |
| The smartphone does not see the microSD | Incompatible format (exFAT/NTFS) | Format the map in FAT32 |
| Constant switching between SIMs | Network priority setting | Turn off Auto Network Selection in SIM Settings |
If none of these methods worked, try:
- Reset network settings: Settings β System β Reset settings β Reset mobile network settings.
- Update the firmware to the latest version (check in Settings β About Phone β System Update).
- Check it out. SIM-The card in another phone β perhaps the problem is in the card itself.
β οΈ Warning: If your microSD device starts to brake or overheat after installing the microSD, check the card for authenticity. Fake microSDs (especially high-volume, low-priced Chinese ones) can cause system failures.
π‘
If the second SIM-The card is not identified, first check it in slot 1. If it works there, but not in slot 2, the problem is in the hybrid connector, and repair is required.
Alternatives: Which Xiaomi smartphones support 2 SIM + microSD
If the Redmi 7βs limitations donβt suit you, consider Xiaomi models with dedicated two-slots. SIM-So here's a few options:
| Model | Year of release | Slots. | Notes |
|---|---|---|---|
| Redmi Note 8 Pro | 2019 | 2 SIM + microSD | 4G support for both SIMs |
| Redmi 9A | 2020 | 2 SIM + microSD | Budget model with dedicated slots |
| POCO X3 NFC | 2020 | 2 SIM + microSD | Good price/quality balance |
| Redmi Note 10 Pro | 2021 | 2 SIM + microSD | AMOLED-screen, fast charging |
When choosing an alternative, pay attention to:
- πΆ Dual VoLTE support (if needed) 4G both SIM).
- π Battery capacity (two) SIM-Cards use up charge faster).
- π± Presence NFC (If you use contactless payments).
If you are fundamentally important model Redmi 7, but lack a slot for microSD, consider buying a version with a large amount of internal memory (64 GB or 128 GB).