Xiaomi Redmi Note 4 is still one of the most popular smartphones in the budget segment, despite the release of new models, but even such a time-tested device can have problems with activation. SIM-card, especially if you're inserting it into your phone for the first time, switching to a new carrier, or resetting your smartphone after a reset. In this article, we'll look at all the possible activation options, including manual settings. APN, Error diagnostics and nuances for different versions of Redmi Note 4 (including versions with the following features) MTK Snapdragon).
Many users are faced with the fact that after installation SIM-The network does not catch cards, it says "Emergency Calls Only" or the phone does not recognize the card at all, and the reasons can be different from a banal improper placement in the tray to a failure in the firmware. We’re not going to be limited to the standard “insert the card and restart the phone” instruction, but we’ll look at all the activation steps, including hidden settings and diagnostics of hardware problems. If you bought a used Redmi Note 4 or restored it after firmware, this guide will help you avoid typical errors.
Preparation: verification SIM-card-slot
Before you start setting up your phone, make sure the problem isn’t in the phone itself. SIM-Xiaomi Redmi Note 4 supports two nano-SIMs (or one) SIM + microSD, but there are nuances:
- 📱 Type SIM-The phone only works with nano-SIM (3FF). If you have a card of a different format, it must be cut or replaced in the cabin of the operator.
- 🔧 Contact status: Check the metal contacts on the SIM-maps, they should be clean, without scratching or oxidizing. If necessary, wipe them gently with a swallow.
- 📶 Frequency support: Redmi Note 4 (especially the version for China) may not support some ranges of Russian carriers.
Also, pay attention to the tray for SIM-map:
- 🔄 On Redmi Note 4 tray combined: slot 1 - only SIM, slot — SIM Or microSD. If you use two of these. SIM, memory card won't fit in.
- 📍 Make sure the card is inserted with the contacts down and before the click. Incorrect installation is the most common cause of non-recognition. SIM.
⚠️ Note: If the phone was previously used with another operator, it may have left the old settings. APN, conflicting with the new SIM. In this case, you will need to manually reset your network settings (more about this below). 📊 What operator do you use on Xiaomi Redmi Note 4?MTSBIlineMegaFonTele2YotaOther 2. Standard activation: insert SIM and erste settings if SIM-The card is new (for example, you just bought it from the operator), the activation process usually goes automatically. SIM-card to the slot and turn on the phone. Wait for the notification "New" SIM-If the card requires activation (for example, MegaFon or Tele2), follow the instructions in the SMS Reboot the phone, sometimes the network only appears after the reboot, and the screen should show the name of the operator and the signal level. If this does not happen, check it out: 🔄 Flight mode: it could turn on automatically. Open the notification curtain and turn it off. 📶 Network Selection: Go to Settings → SIM-maps and mobile networks → Select the network and select Automatic mode or manually find your operator. SIM-maps (nano-SIM) Make sure the tray is inserted before clicking Turn off Flight Mode Reboot phone after installation SIM --> If after these actions the network has not appeared, go to the next section - there we will analyze manual settings. APN Diagnosing problems 3. Manual addition of access points APN Often the network does not work due to lack or incorrect settings. APN (Access Point Name is the “address” at which the phone connects to the Internet and operator services. Xiaomi Redmi Note 4 APN You can add manually: Go to Settings → SIM-maps and mobile networks → [Choose yours. SIM] → Access points (APN). Click on the three dots in the top right corner and select "New Access Point." Fill in the fields according to your operator's data (see table below). Save settings and restart the phone. Operator Name APN APN Type of authentication MTS mts Internet.mts.ru PAP or CHAP Beeline Internet.beeline.ru PAP MegaFon Internet Not specified Tele2 tele2 internet internet.tele2.ru PAP If your operator is not in the table, find the current settings. APN On its official website. On Xiaomi Redmi Note 4 with firmware MIUI 10 or below may require additional settings such as “Type of APN» (usually default,supl,mms) and "port" (e.g. 8080 for MMS). ⚠️ Note: If, after preservation, APN settings do not apply, try to delete all existing profiles APN And you can create a new one from scratch. Sometimes old profiles block new ones. 💡If, after setting up, APN The Internet is not working, but calls are passing, check the balance - some operators block data transmission when there is a negative balance, even if there is money in the account. 4 Diagnostics of problems: why SIM It is not activated after all manipulations. SIM-The map is still not working, it could be hardware or software. Let's look at the most common ones. 🔌 A damaged slot. SIM: If the contacts in the slot are bent or oxidized, the phone will not be able to read the card. 📱 Communication module malfunction: Redmi Note 4 (especially after falls or moisture) may fail the module responsible for the work SIM. In this case, only repairs will help. 🤖 Firmware failure: if the phone was flashed by unofficial software, the communication module (RIL) It might not work properly. The solution is to stitch the original. MIUI. 🔄 Conflict IMEI: Redmi Note 4 (especially the Chinese version) is reset IMEI, You can restore it through the engineering menu (#4636##) to see if it's the fault. SIM-Card or phone, try: Insert: SIM In another phone - if it works, the problem is in the Redmi Note 4) SIM In your Redmi Note 4, if it's not recognized, a malfunction in your phone. IMEI Xiaomi Redmi Note 4 If you are in Settings → The phone. → General information is displayed incorrectly IMEI or zeros, it can be restored via the engineering menu: 1. Enter ##4636## and select Phone Information. 2. Scroll down to the “Set preferred network type” block and check the current one. IMEI. 3.If IMEI No, you will need to be able to get through QCN-file (you need a PC and a program for this) QPST). ⚠️ Recovery IMEI — A complex procedure that, if mistaken, can permanently block the network. If you're not sure, contact the service. 5. Features for different modifications of Redmi Note 4 Xiaomi Redmi Note 4 It was produced in several versions, and each has its own nuances when working with the SIM-Maps: Modification of the processor Features SIM Frequent problems with the Redmi Note 4 (Global) Snapdragon 625 Supports all Russian frequencies (B1/B3/B7/B20) Rarely - failures APN post-refresh MIUI Redmi Note 4X (China) Snapdragon 625 or Helio X20 Maybe not supportive. B20 (800 MHz), which is why the weak signal in rural areas Lack of Russian, problems with the use of the Russian language IMEI Redmi Note 4 (India) Snapdragon 625 Optimized for local operators, but works with Russian companies SIM Slow work 4G If you have a Chinese version (Redmi Note) 4X), For full-fledged work with Russian operators may be necessary: 🌐 Global firmware MIUI (for example, miui_HMNote4Global). 📡 Manual addition of frequency bands through the engineering menu (##4636## → «Set preferred network type» → choose LTE/WCDMA/GSM For versions from MediaTek Helio X20 (less common) may require additional configuration of modem files, as these processors sometimes conflict with some of the SIM-map. 💡If you have a Chinese version of the Redmi Note 4X, before the firmware MIUI I'll make sure you backup. IMEI — he can drop off! 6. Additional settings: speed up the network and solve specific problems SIM-The card is activated, but the network is unstable (for example, disappears). 4G or slow internet, try the following settings: Optimize internet speed 📶 Forced choice 4G: engineer (##4636##) Select "Set Preferred Network Type» → LTE It'll make the phone always use. 4G, if the network is available. 🔄 Disabling Automatic Switching: in Settings → SIM-maps and mobile networks → [yours SIM] → Type of network Select Only 4G (If the phone only shows emergency calls, the reasons may be as follows: 🔒 SIM-the card is blocked by the operator (for example, due to non-payment). USSD-request (e.g. *100# for MTS). 📡 No network coverage: Try manually selecting the network in Settings → SIM-maps and mobile networks → Choice of network. 🔧 Failure in firmware: if the problem appeared after the update MIUI, Try to roll back to the previous version. If nothing helps, reset the network settings: Go to Settings → System and device → Additionally. → Settings reset. Select Network Settings Reset (not to be confused with a full reset!) After rebooting, reset. APN. 7. Alternative ways to activate (if nothing works) If standard methods did not help, try the following solutions: USSD-Some operators allow you to activate SIM-map through special teams: 📞 For MTS: dial *111*1# and follow the instructions. 📞 For Beeline: *110*180#. 📞 For MegaFon: *105*00#. Use another phone to activate if Redmi Note 4 stubbornly SIM, Try: Activate the card on another phone (even on the button). 10–15 Minutes – sometimes the operator needs time to register SIM Return the card back to the Redmi Note. 4 Update the firmware if the problem occurred after the update MIUI, try: 🔄 Reverse to the previous version of the firmware via Fastboot. 📱 Install custom restoration (for example, TWRP) and sew clean MIUI. ⚠️ Note: When you run through Fastboot on Redmi Note 4 with a bootloader locked, the phone can turn into a brick. Before you run the firmware, unlock the bootloader through the official Mi Unlock tool. FAQ: Frequent questions about activation SIM Xiaomi Redmi Note 4: My Redmi Note 4 doesn't see the second one SIM-Check: Is the card inserted correctly (slot 2 only supports nano-SIM or microSD) is the second slot damaged (try inserting the same one). SIM Is the second included in slot 1? SIM in settings: Settings → SIM-maps and mobile networks → Management SIM-If the slot doesn't work, maybe the contact on the board has gone, it needs repair, and then the firmware has stopped working, and how do you repair it? IMEI You can try it, or you can get your modem files corrupted. IMEI via the engineering menu (#4636##). Sweep the original modem.img For your version of the Redmi Note 4. Completely reset (Wipe Data) to TWRP. If it doesn't work, run your phone through Mi Flash with the Clean All option. The phone shows the network, but there's no Internet. What's the matter? Reasons: Wrong settings APN (Check the table above. Traffic is out or Internet access is blocked (check balance through the *100# or *111#). The operator temporarily restricted access (for example, due to suspected fraud) and try to disable and enable data transmission again in the settings. SIM. Can I use the Redmi Note? 4 No, no, no, no, no, no, no, no, no, no, no, no. 4 It does not support eSIM, only physical nano-SIM cards. If you need eSIM support, consider newer models, such as Xiaomi. 12T or Redmi Note 11 Pro+. After the fall, the phone stopped seeing. SIM. What do you do? Most likely damaged: SIM slot (check contacts for bendability), antenna module or plume connecting the slot to the motherboard. You can try it yourself: Carefully remove the tray and check if the contacts are bent. Blow the slot with compressed air (possibly dust got inside). If this does not help, contact the service - you may need to replace the slot or solder the contacts.