How to insert it correctly SIM-map 3S: photo-instruction

Xiaomi Redmi 3S — One of the brand's most popular budget smartphones, released in 2016, and despite its age, the device is still in active use today due to its reliability and the ability to install two smartphones. SIM-But many users have difficulty with the first switch on: how to open the tray, what type of card you need, and what to do if the network is not catching. SIM-maps 3S From A to Z, taking into account all the nuances and typical errors.

The feature of the model is a hybrid slot that supports either two nano-SIMs or one nano-SIM + microSD memory card. This means that if you want to expand memory, you have to sacrifice a second SIM, we will explain in detail how to avoid problems with card recognition, what tools you will need, and what to do if the smartphone does not see the network after installation.

Preparation: What will be needed for installation SIM-map

Before you start installing, make sure you have everything you need. Xiaomi Redmi 3S requires nano-SIM (the smallest format). If your old card (mini-SIM or micro-SIM), it will have to be cropped or replaced in the cabin operator.

• 🔧 A paper clip or needle to remove the tray (combined with the phone, but often lost) will do any thin metal wire.
• 📱 Charged smartphone (at least on the phone) 20-30%) — post-installation SIM You may need to set up a network.
• 📶 Access to the operator’s network: if the card is new, it will have to be activated (instruction below).
• 🔄 Backup data (if you plan to retrieve microSD – sometimes the smartphone asks for a reboot after changing cards).

Important: Redmi 3S supportive 2G/3G/4G, second SIM-The card only works in mode. 2G. If you need high-speed connectivity on both SIMs, you’ll have to choose between them or use a single card.

Where is the slot for SIM-maps 3S

Unlike many modern smartphones, the Xiaomi Redmi 3S slot is located on the right end of the case (if you look at the screen), it is easy to recognize by the small hole for the paper clip.

Note that on some modifications (for example, Redmi 3S Prime), the slot can be slightly recessed into the case. Don't be afraid - this is normal.

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If the hole for the paperclip clogged with dust, gently clean it with a toothpick, so as not to break the mechanism of extracting the tray.

Step-by-step instruction: how to insert SIM-map

Now, to the process itself, follow the instructions carefully so that you don't damage the tray or the contacts. SIM-map:

1. Turn off your smartphone. This is not necessary, but it is recommended to avoid failures in card recognition.
2. Find a clip hole on the right end and insert the needle to the end. Press with a little effort - the tray should pop out 2-3 mm.
3. Take the tray out with your fingers carefully. Don't pull it around the corner, you'd better grab it on the sides so you don't bend.
4. Put it down. SIM-slot-card: 📱 Slot 1 (upper 4G/3G/2G. 📱 Slot 2 (bottom) - only 2G microSD.

Make sure the card is down with the contacts.

Put the tray back in.

Critically, if you install a microSD, it must be formatted in FAT32 (maximum supported capacity is 256 GB), otherwise the smartphone will not see the memory card.

Common Mistakes and How to Avoid Them

Many users face problems after installation SIM-Here are the most common ones and the ways to solve them:

⚠️ Attention: if after installation SIM-If you're not using your phone, don't panic. You may not have entered the groove. You may have to press it carefully before you click, which usually solves the problem. If the phone doesn't respond anyway, take out the tray and check if the contacts are bent.

How to activate a new one SIM-map

If you put a new one in. SIM-It's a map that needs to be activated. Most of the time, it's automatic, but sometimes you need to manually adjust it:

1. Turn on your smartphone and wait for the network to appear (it can take up to 5 minutes).
2. If there is no network, go to Settings. → SIM-maps and mobile networks.
3. Choose yours. SIM-map and turn on the setting Enable (if it is disabled).
4. In Network Type, set 4G/3G/2G (auto) for the first SIM or 2G for the second.
5. If required, enter PUK-code (indicated on the plastic holder) SIM-map).

For some operators (e.g. the Television)2 or Iota) may require shipment USSD-It's usually in the instructions for the team. SIM-For example, to activate the Internet packet on the MTS, you need to dial *111*1#.

Compatibility with memory cards: can you use microSD?

As mentioned, the Redmi 3S has a hybrid slot.This means you can:

• 📱 Use two nano-SIMs (without a memory card).
• 📱 Use one nano-SIM + microSD (second microSD) SIM won't work).

If you choose the second option, consider:

• The maximum supported microSD volume is 256 GB (but it is better to use cards up to 128 GB for stability).
• Read/write speed depends on the card class. For recording video in Full HD, the UHS-I (U1) or higher class is recommended.
• Once you have a microSD, your smartphone might suggest that you transfer your application data to it, and you don't agree, it'll slow down your phone.

⚠️ Note: if you retrieve the microSD while recording videos or transferring files, it may cause data loss or card damage. Always safely remove the drive through Settings → Warehouse → Extract SD-map.

Frequent questions about SIM-maps 3S

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The main rule of installation SIM-maps 3S: Always turn off your smartphone before removing the tray, which prevents damage to contacts and network failures.