Xiaomi Redmi 4X — One of the brand's most popular budget smartphones, but even experienced users sometimes have questions about its setup. SIM-cards seem to be a simple procedure, but ignorance of the nuances can lead to damage to the tray, malfunctioning of the network or even breakage of the slot. SIM redmi 4X, including working with a hybrid slot, choosing a nano-SIM format and solving typical connection problems.
The feature of the model is a hybrid slot that supports either two nano-SIMs or one SIM + microSD card. This requires careful configuration choices. We will show you in detail how to remove the tray without damage, what tools to use, and what to do if the smartphone does not see the card after installation, and you will learn how to check the compatibility of the operator and set the priority of SIM for calls.
Preparation: which SIM-Cards are suitable for Xiaomi Redmi 4X
Before installing, make sure you have the right SIM format. Redmi 4X only supports nano-SIM (4FF) – this is the smallest standard measuring 12.3 × 8.8 mm. If you have a card of another format (micro or standard), it will have to be cropped or replaced in the cabin of the operator.
Important: The model has a hybrid slot, which means:
- 🔄 Option 1: Two nano-SIMs (without microSD).
- 📱 Option 2: One nano-SIM + microSD memory card (up to 256 GB).
If you plan to use two SIMs, check if your operator supports Dual Standby (simultaneous waiting for calls on both cards).
Tools for extracting the tray: what can and can not be used
To open the SIM slot in Xiaomi Redmi 4X you will need a paper clip or a special key (included).In no case do not use sharp objects (needles, knives, toothpicks) - they can damage the lock mechanism or scratch the case.
Suitable tools:
- 📎 Opened paper clip (diameter) ~0.7 mm mm).
- 🔑 Special key from the set (usually attached to documents).
- 🖊️ The gel pen cap (if nothing else).
⚠️ Attention: Do not apply excessive force when pressing the slot hole. If the tray does not extend, check if dirt has entered the mechanism. In extreme cases, carefully blow the hole with compressed air (for example, a sprayer for cleaning equipment).
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If you don’t have a paper clip, you can use a thin guitar string or headphone wire (only neatly, without sudden movements).
Step-by-step: how to insert SIM in Xiaomi Redmi 4X
Follow this algorithm to avoid errors:
- Turn off your smartphone. This is not necessary, but it is recommended for safety (especially if you are working with a tray for the first time).
- Find the SIM slot. In Redmi 4X, it is located on the left end of the case (if you hold the phone with a screen to yourself).
- Put the paperclip in the hole before you click. The tray should extend 2-3 mm — pull it with your fingers.
- Place it. SIM-card(s: 📱 For one. SIM: Install nano-SIM in the slot SIM1 (usually marked). 🔄 For two. SIM: into SIM1 and SIM2 (Check if there are any restrictions on 4G second-slot). 💾 For SIM + microSD: nano-SIM in SIM1, microSD card.
Put the tray back in.
Turn on the phone.
☑️ Pre-installing check SIM
Important: At Redmi 4X slot SIM2 (second, may not support 4G in some regions. Check network settings in Settings → SIM-maps and mobile networks.
Frequent Mistakes and How to Avoid Them
Even with the right SIM installation, there can be problems. Consider typical situations and solutions:
| Problem. | Possible cause | Decision |
|---|---|---|
| Smartphone doesn't see SIM | Poor contact, contamination of the slot | Remove the tray, wipe the SIM contacts with dry cloth, reinstall |
| No network or "Emergency Calls Only" | Non-activated SIM or incorrect APN settings | Check balance, restart phone, set up APN manually |
| 4G only works with one SIM. | Second Slot Limitation (SIM2) | Change maps or check your settings in Mobile Network → Preferred network type |
| The tray is not fixed. | Skewing or foreign object in the slot | Examine the slot for the presence of garbage, carefully insert the tray before clicking. |
⚠️ Attention: If after installation SIM The smartphone stopped turning on or makes an error "SIM-The card is not supported, this may indicate a hardware malfunction of the slot, in which case contact the service center - self-repair can aggravate the problem.
Network settings after SIM installation
After successful installation of SIM, you need to configure the network settings:
- Go to Settings. → SIM-maps and mobile networks.
- Select the priority SIM for calls, SMS and mobile internet.
- Activate Mobile Data and set your preferred network type (recommended 4G/3G/2G (auto)).
- If the internet is not working, check the APN access points. These are usually set up automatically, but sometimes manual input is required (options can be found on the operator's website).
To speed up the connection to the network, you can manually select the operator:
- To the Mobile Network → Network operators.
- Turn off Automatic Selection.
- Wait for the available networks and choose your operator.
⚠️ Note: If you decide to replace the slot yourself, buy the original part (article for Redmi). 4X — MDY060100). Cheap analogues may not fit in size or quality of contacts.