Xiaomi Redmi 8 Pro – a popular smartphone with support for two SIM-There are some features to this, but many users have difficulty installing a second SIM, and unlike flagship models, where the card slot is often combined with a microSD tray, there are some features. SIM Hybrid slot, what card formats are supported, and how to avoid typical network setup errors.
It is important to understand that the Redmi 8 Pro uses a hybrid slot (2 nanoSIM). + microSD or 1 nanoSIM + microSD: This means that you can use either two at a time. SIM-card SIM + If you need both SIMs, you'll have to sacrifice the expansion of memory, and then you'll have a step-by-step instruction with the photo, the setup tips, and the answers to the frequent questions.
Preparation: which SIM-The cards are suitable for the Redmi 8 Pro
Before installing the second SIM-Make sure it meets the device’s requirements. Xiaomi Redmi 8 Pro supports only nanoSIM format (4FF). If you have an old card (miniSIM or microSIM), you will have to cut it off or replace it from the operator.
Also check if your tariff supports Dual SIM. Some operators (such as Tele2 or Iota) may block the second SIM if it is from another provider, in which case you will need to activate the MultiSIM service or Double Number.
- 📱 Map format: nanoSIM only (4FF). MicroSIM and miniSIM will not work without an adapter.
- 🔄 Operating modes: 2 nanoSIM (without microSD) 1 nanoSIM + microSD (up to 512 GB)
- 📡 Network support: 4G (LTE), second SIM can only work in 3G/2G, if the first use is 4G.
⚠️ Note: If you are using a microSD card, the second one is SIM-You have to choose between two SIMs or one SIMs. + memory.
2 Where is the slot for SIM-Maps in Redmi 8 Pro
Tray for SIM-The Xiaomi Redmi 8 Pro is located on the left end of the device (if you look at the screen), it is easy to recognize by the small hole for the tool from the kit!
To remove the tray, you'll need a paper clip or a special key (complete with your phone) If you don't have a key, an unbended paper clip or a blunt-ended needle will do, and don't use sharp objects (knives, pins) - this can damage the tray's locking mechanism.
| Element | Description | Photo/schematic |
|---|---|---|
| SIM tray | Metal tray with slots for 2 nanoSIM or 1 nanoSIM + microSD | 📷 (signage) |
| Recovery hole | Small circular hole next to the tray (diameter ~1 mm) | 🕳️ |
| Tool. | Key of a set or paper clip with a diameter not exceeding 0.8 mm | 🔑 |
3. Step-by-step instruction: how to insert a second SIM
Now, let's get to the process. Follow the instructions carefully so you don't damage the slot or the slot itself. SIM-map.
☑️ Preparation for installation of the second SIM
- Turn off your smartphone. This is not necessary, but it is recommended to avoid accidental tapping or failure when you remove the tray. If the phone is on, put it into flight mode.
- Remove the tray. Put the key (or paper clip) in the hole next to the tray and press a little until the tray is pushed out. Don't put too much effort into it!
- Place it. SIM-There are signs on the tray: SIM 1 — basic SIM (recommended 4G) SIM 2 — second-second SIM (will work in 3G/2G, if 4G) microSD - a slot for a memory card (replaces) SIM 2)
Make sure the cards are in the contacts down and match the cutouts on the tray.
Put the tray back in.
Carefully insert the tray before the click. Make sure it sits straight -- if the tray is skewed, remove and try again.
Turn on the phone.
After switching on, wait for the network definition (can take up to 2 minutes).
⚠️ Note: If after installation of the second SIM-The phone does not see any of the networks, check: Correct installation of cards (contacts must be clean). SIM Operator (sometimes time or re-registration is required) Network settings → SIM-maps and mobile networks.
4. Set up second SIM-postcard
Once the cards are physically installed, you need to set their priorities. 8 The Pro can only use one SIM for 4G-The network will be running and the second will be running. 3G/2G. This is a hardware limitation, it cannot be circumvented.
To set up networks:
- Go to Settings. → SIM-maps and mobile networks.
- Choose a Name. SIM-cards to assign each label (e.g., "Worker" and "Personal").
- In the Preferred Network for each SIM, select: For SIM 1: 4G (preferably) For SIM 2: 3G or Auto
Double 4G
You can also set up:
- 📞 Calls: Choices SIM for outgoing calls (in the phone book or when dialing a number).
- 📶 Mobile Internet: What is it? SIM It is used for data transmission (only one can be active).
- 📩 SMS: Choice SIM default.
💡
If the second SIM does not catch the network, try to manually select the operator in the settings: → SIM-map → [Choose. SIM] → Network operators → Manual search.
Frequent problems and their solutions
Even after installing the Redmi 8 Pro properly, users may face difficulties.
| Problem. | Possible cause | Decision |
|---|---|---|
| The phone doesn't see the second SIM | The card is inactive at the operator Bad contact in the slot | Check the SIM status with the operator Remove and reinstall the card |
| No network on the second SIM | The first SIM uses 4G, the second automatically switches to 2G | Manually select 3G network mode for second SIM Check coverage area |
| Mobile Internet is not working on the second SIM | Only one SIM can use mobile data. | Turn the Internet to the right one. SIM In Settings → SIM-map → Mobile Internet |
If none of the solutions worked, try:
- Update the phone’s firmware to the latest version (sometimes SIM bugs are patched in updates).
- Reset network settings: Settings → System → Reset → Network settings reset.
- Contact the service center if the problem is hardware (for example, a damaged slot).
What if the tray is jammed?
6 Can I use two SIMs and a memory card at the same time?
No. Xiaomi Redmi 8 Pro has a hybrid slot, which means:
- 2 nanoSIM (without microSD)
- 1 nanoSIM + microSD (second SIM is not available)
It's a hardware limitation, and it can't be circumvented software if you need both. SIM-Cards and additional memory, consider the following options:
- 🔄 Cloud storage: Mi Cloud, Google Drive or Yandex Disk for backup photos and files.
- 💾 OTG-drive: plug-in flash drive USB-C (Supported by Redmi 8 Pro).
- ☁️ Streaming services: Music and video via Spotify, YouTube Premium or Netflix (do not take up space on the phone).
💡
If you’re critically interested in two SIMs and memory, consider models with dedicated slots, such as the Redmi Note 10 Pro or the POCO X3 Pro.
7. Alternative ways of using two numbers
If the Redmi 8 Pro hybrid slot doesn’t suit you, there are alternative solutions for working with two numbers:
- 📱 eSIM: Some operators (e.g. MTS or Beeline) support virtual SIM. However, Redmi 8 Pro does not support eSIM, so this option is not suitable.
- 🔄 Call forwarding: Set up a redirect from the second number to the first through USSD-commands (e.g. 21[number]# for MegaFon).
- 📞 Second phone: Use an old smartphone with one SIM as a "call caller" (e.g. Redmi) 4A or Nokia 105).
- 🌐 Multi-account messaging: WhatsApp Business or Telegram with two accounts on the same phone.
You might also consider buying an external Dual SIM module (like the Bluboo Dual), which connects over Bluetooth and allows you to use two numbers on the same phone, but such devices often have problems with communication quality and compatibility.