Smartphone Xiaomi Redmi 9C It's one of the most popular budget devices, because it's balanced and it's affordable, but even a simple operation like installation. SIM-This article will not only examine the basic procedure for inserting a SIM, but also the nuances that are not written in the official instructions, from choosing the right nano-SIM format to solving problems with no network after installation.
Feature of Redmi 9C — A hybrid tray that supports either two nano-SIMs or one nano-SIM + This requires careful installation so that contacts are not damaged or memory expansion is not lost, and we will also show you how to avoid common mistakes, such as improper cropping. SIM-cards or install it "upside down", which can damage the slots.
If you have just purchased a Xiaomi Redmi 9C or are planning to change carriers, this guide will help you get it right the first time, and for those who have experienced problems after installation (no network, no SIM is determined), we have prepared a section with diagnostics and solutions.
Preparation: what type SIM-I need a card for Redmi. 9C
Xiaomi Redmi 9C supports only nano-SIM (4FF) format, the smallest standard of SIM cards size 12.3 × 8.8 × 0.67 mm. If you have an old card (mini-SIM or micro-SIM), it will have to be cropped or replaced by the operator.
- 📱 New SIM-map: the best option is to request nano-SIM when buying a tariff. Most operators (MTS, Beeline, MegaFon, Tele2) issue universal cards with logging for all formats.
- ✂️ Cutting off the old one SIM: If you cut yourself, use a template or a special stapler. 1 mm error can make the card inoperable.
- 🔄 Hybrid tray: at Redmi 9C slot SIM2 It's combined with a microSD connector. SIM memory card won't fit in.
Important: If you plan to use two SIM-Make sure both of these support the network. 4G. At Redmi. 9C first slot (SIM1) work LTE, second (SIM2) limited 3G. This is true for operators who are actively shutting down networks. 3G (For example, MTS in some regions).
⚠️ Attention: Some users try to insert a micro-SIM without an adapter by bending the contacts, which damages the connector and loses the warranty. If your card is not fit for size, replace it with the operator.
Step-by-step instruction: how to insert SIM-map 9C
The process of installing a SIM card takes no more than a minute, but requires care.
- 🔌 Turn off your smartphone, though Redmi. 9C Supports a hot replacement SIM (without turning off, we recommend turning off the power to avoid modem malfunctions.
- 📍 Find a tray for SIM. It's on the left end of the device (if you look at the screen), and it comes with a special key-clip (if you lose it, you'll get a straight paper clip).
- 🔗 Remove the tray. Put the key in a small hole next to the slot and press before you click. The tray will extend 2 to 3 mm -- gently pull it over.
- 📇 Install. SIM-Put the nano-SIM in the tray with the contacts down, aligning the bevelled corner of the card with the same angle on the slot. SIM use both nests (SIM1 and SIM2).
- 🔙 Put the tray back in place. Put it all the way up, make sure it sits straight. If the tray doesn't lock, check if it's installed correctly. SIM.
- 🔋 Turn on your phone. Check if the system is loaded and if there's no signal, restart the device.
Clean tray (no dust/garbage) |
SIM-Proper size card (nano-SIM)|
The bevelled corner of the card coincides with the angle on the slot |
Key-clip at hand-->
After installation SIM-The card is not determined, try the following steps:
- 🔄 Reboot your smartphone.
- 📶 Manually select the network in the settings: Settings → SIM-maps and mobile networks → Choice of network.
- 🔧 Check if it's activated. SIM Operator (sometimes it takes time to register on the network).
What to do if the tray is not removed?
Common Mistakes and How to Avoid Them
Even experienced users sometimes make mistakes when installing SIM-maps 9C. Here are the most common ones and ways to prevent them:
| Mistake. | Effects of consequences | Decision |
|---|---|---|
| Installation of SIM contacts upwards | Map not identified, possible scratches on contacts | Turn the map over and insert it again. |
| Using a micro-SIM without an adapter | Damage to the connector, loss of warranty | Cut the card to nano-SIM or replace it with the operator |
| Strong pressing on the tray during installation | Deformation of the tray or bending of SIM contacts | Insert the tray smoothly, without effort |
| Ignoring the sloping angle | The map is crooked, there may be problems with reading. | Combine the beveled corners of the card and slot |
Critical error: trying to insert SIM-card in a microSD slot. In a Redmi hybrid tray 9C The memory card slot is visually similar to SIM-It's a slot, but it has a different connector. SIM There, immediately remove it – a long stay in an unintended slot can damage the contacts.
⚠️ Attention: If after installation SIM-The card is no longer visible to the memory card (or vice versa), check if the tray has moved when inserted. Often the problem is solved by re-installing with a neat fixation.
How to check if it is installed correctly SIM-map
After installation SIM-maps in Xiaomi Redmi 9C Follow the following steps to ensure that the work is done correctly:
- 📶 Check the network indicator. The top panel should display a signal icon (e.g, 4G or 3G). If you see a cross or a sign saying "No service" instead» — SIM unrecognizable.
- 📞 Try making a call. Dial it. USSD-call the operator (for example, *100# for Beeline) or call another number. If the call does not pass, there is a problem with registering on the network.
- 🌐 Activate the mobile Internet. Go to Settings → SIM-maps and mobile networks → [yours SIM] → Access point (APN) Check that the parameters are APN It is in accordance with your operator’s settings.
- 🔍 Look at this. IMEI. Enter in the phone keyboard *#06#. If two are displayed IMEI (for SIM1 and SIM2) — both cards are recognized by the system.
If SIM-The map is determined, but there is no internet, check:
- 📡 Is mobile traffic enabled in settings (Settings) → SIM-maps and mobile networks → Mobile traffic).
- 💳 Is there enough money in the account (some operators block the Internet with zero balance).
- 🔄 Restart your phone – sometimes the modem “hangs” when you first connect.
💡
If you have two. SIM-cards, but one of them doesn't catch 4G, Check the priority of the network in the settings. 9C only SIM1 supportive LTE, Therefore, for maximum Internet speed, install the main card in the first slot.
What to do if Redmi 9C see SIM-map
After installation SIM-The phone doesn't recognize the card, it can be software or hardware, and start with simple solutions and gradually move on to more complex ones:
1. Software malfunctions
- 🔄 Reboot. Turn off the phone for 30 seconds, then turn it on. Sometimes it helps to reset the modem.
- 📱 Reset network settings. Go to Settings → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth.
- 🔧 Update: Outdated firmware can cause conflicts with SIM. Check for updates in Settings → The phone. → Updating the system.
- 🛠️ Manual network selection. In Settings → SIM-maps and mobile networks → Select the Manual mode and find your operator.
Hardware problems
- 🔍 Check the tray. SIM Check the contacts for contamination or damage, clean them with a soft brush if necessary.
- 📏 Make sure the clipping is correct. If you cut the card yourself, compare it to the original nano-SIM. Even a slight discrepancy can interfere with reading.
- 🔌 Check the other slot. If you have two. SIM, If one card works and the other doesn't, the problem is the card itself. SIM or her slot.
If none of these things work, the modem or the antenna unit may be faulty, and then you can go to the service center, and if you try to repair the antenna or solder the contacts yourself without experience, you almost always end up completely shutting down the communication module.
💡
Before carrying the phone for repair, try to insert the obviously working SIM-If it's not identified, it's the device, not the SIM.
How to use two of them SIM-maps at Redmi 9C
Xiaomi Redmi 9C Supports the work of two SIM-cards (Dual) SIM), But with some limitations. Here's what you need to know:
- 📶 Only SIM1 supportive 4G. Second second SIM (SIM2) It only works on networks. 2G/3G. If you want fast internet, install the main card in the first slot.
- 🔄 Switching between SIM. When calling or sending SMS You can choose which card to play from. To do this, tap the icon. SIM near-button.
- 📵 Call restrictions. If you talk one at a time SIM, The second will be unavailable for incoming calls (they will be forwarded to voice mail).
- 🌐 Mobile Internet. You can only turn on traffic on one. SIM To switch, go to Settings. → SIM-maps and mobile networks → Mobile traffic.
To customize names for SIM-maps (e.g., “Worker” and “Personal”), go to Settings → SIM-maps and mobile networks → Names SIM-This will help you not to get confused when choosing a card for calls or SMS.
⚠️ Note: If you use two of these SIM-card and memory card at the same time, one of the SIM-The cards will not be available (Redmi Hybrid Slot) 9C not supportive SIM2 + MicroSD: Priority given to memory card.