How to insert it correctly SIM-Map in the smartphone Xiaomi Mi 3: instructions with photos and tips

Xiaomi Mi 3 is one of the brand’s legendary models, released in 2013, but still used by many users. Despite its venerable age, the device supports modern communication standards, but the installation of the device is not limited to the current standard of communication. SIM-If you just bought a used device or decided to bring an old gadget back to life, this material will help avoid the typical mistakes when installing a SIM.

Unlike modern smartphones with retractable trays, the Mi 3 requires a complete removal of the back cover — this is scary for beginners, but in practice it takes no more than a minute. The main thing is to know where the SIM slot is, how to place the card correctly (especially if you have a nano-SIM instead of a standard one), and what to do if the phone does not see the network after installation, we will understand all the steps from tool preparation to troubleshooting.

Xiaomi Mi 3 supports only one thing SIM-card SIM + microSD in a hybrid slot, depending on the modification. If you need two SIMs, you have to choose between them or use adapters — but more on that later.

What? SIM-The card supports Xiaomi Mi 3?

Xiaomi Mi 3 is equipped with a slot for micro-SIM (15×12 mm). This is an intermediate format between the standard SIM and modern nano-SIM.

• 📱 Standard. SIM (25×15 • You need to trim it to the size of a micro-SIM or use an adapter (but it is inconvenient).
• 🪪 Nano-SIM (12.3×8.8 mm) – can be inserted into the adapter for micro-SIM or gently glued to double-sided tape so that it does not hang out in the slot.
• 🔄 eSIM is not supported. You have to order a physical card from the operator.

Before installing, check what type of SIM your mobile carrier gives you. Many salons replace the standard SIM with a micro-SIM for free in 5-10 minutes. If you crop the card yourself, use a clipping template - a 1 mm error can make the SIM unusable.

⚠️ Note: Some modifications of the Xiaomi Mi 3 (e.g., Mi 3) TD China only supports networks 3G standard TD-SCDMA. If you buy a used device, check with the seller whether it is compatible with your operator. In Russia, such models work only with MegaFon and Tele2 in limited mode.

Preparation for installation: what will be needed?

Insert SIM-Map in Xiaomi Mi 3, prepare:

• 🔧 A plastic shoulder blade or a mediator to remove the back cover, metal objects (knives, screwdrivers) can scratch the body.
• 📎 Scotch or Adapter – if you have a nano-SIM to lock it into the slot.
• 🔋 Charger – it is recommended to charge the phone at least 30% to avoid a sudden shutdown during setup.
• 📡 Pin code from SIM — if the card is secure PIN, It will be requested at the first inclusion.

Also check if the phone is turned off. SIM installation in the device on can cause card recognition to fail. If you haven't used the Mi 3 in a long time, you should reset the settings to factory settings before installing the SIM, which will eliminate possible software conflicts.

💡

If the back cover Xiaomi Mi 3 sits tightly and does not lend itself to the shoulder blade, slightly heat it with a hair dryer (not higher than 50 ° C) - the glue will become more elastic.

Step-by-step: how to insert SIM in Xiaomi Mi 3

Follow the algorithm to avoid damage to the slot or SIM-map:

1. Turn off the phone and remove the battery (if it is removable). In the Mi 3, the battery is non-removable, so just make sure the device is turned off.
2. Remove the back cover: Insert the plastic blade into the gap between the lid and the body (start at the bottom corner). Carefully drive the blade along the perimeter, separating the latches. Do not apply force - if the lid does not respond, check if all latches are snapped.
3. Find a SIM slot: It is located under the battery (if the battery is not removable, the slot will be visible immediately after the lid is removed). In hybrid versions, the slot is combined with a microSD connector (SIM1 / TF marking).
4. Install. SIM-Map: The card contacts should be down, the bevelled corner should be to the outer edge of the phone. If you use a nano-SIM with an adapter, make sure it sits tight and doesn't fall out when you vibrate.
5. Close the lid: Make sure all the latches are in place. If the lid is dangling, then one of the latches is not locked.

Simka is inserted with contacts down |

Cover tightly locked |

Phone's off |

Battery charge of at least 20%-->

⚠️ Attention: If after installation SIM The phone doesn't see the network, don't try to reboot it many times:

• Is the card inserted correctly (try to re-insert and re-insert).
• Does your operator support Mi 3 frequency (e.g. Yota and Tinkoff Mobile may not work)
• Activated? SIM-The card (especially if it is new).

What to do if Xiaomi Mi 3 does not see SIM-map?

SIM recognition issues in the Xiaomi Mi 3 are usually due to one of 5 factors:

If the problem is in IMEI, you can restore it through the engineering menu:

1. Dial ##4636###.
2. Go to the phone information.
3. Check your IMEI status. If it's not available, use programs like ChimeraTool or contact the service.

Can we use two? SIM-Maps in Xiaomi Mi 3?

Officially, the Xiaomi Mi 3 is a single-sim phone, but there are ways to get around this limitation:

• 🔄 Hybrid slot: In some versions (for example, Mi 3) TD) The slot is combined with a microSD connector. You can choose either the second one. SIM, A memory card, but not both at the same time.
• 📱 Dual-SIM Adapter: There are adapters that allow you to insert two nano-SIMs into one micro-SIM slot. However, they often cause problems with network recognition and overheating.
• 🌐 Virtual SIM: Some operators (for example, MegaFon) offer a service called "Mobile Office", which allows you to use one number on two devices.

If you’re critically interested in two SIMs, consider buying a low-cost second phone (like the Xiaomi Redmi 4A) or switching to a model with official Dual-SIM support, like the Redmi Note 3 Pro.

💡

Use of adapters for two SIM-Mi 3 cards can lead to loss of warranty (if it is still valid) and deterioration of communication quality.

How to trim the standard SIM under the micro-SIM for Xiaomi Mi 3?

If you only have a standard SIM, you can trim it to the size of a micro-SIM.

1. Print the template for trimming (scale 100%).
2. Plug the pattern on SIM-map and circle the marker of the cut line.
3. Carefully trim the extra parts with scissors or a stationery knife.
4. Clean the edges with sandpaper (granularity 1000-1500) so that they do not scratch the slot.

⚠️ Note: If you make a mistake in cutting, SIM-It's better to spend 10 minutes visiting a communications salon than taking risks. SIM free of charge upon presentation of a passport.

In Xiaomi Mi 3, the micro-SIM slot has a small backlash — if the clipped card hangs around, lock it with a piece of tape or double-sided tape, which will prevent communication from losing when vibrating.

Frequent errors when installing SIM in Xiaomi Mi 3

Even experienced users sometimes make mistakes that lead to a broken SIM or damage to the phone.

• 🔌 Installation SIM when the phone is turned on - this can cause a short circuit or a modem malfunction.
• 🔄 Mixed contacts – if you insert the card “upside down”, the contacts will bend, and SIM will have to replace.
• 🔧 Using Metal Tools – Scratches on Slot Contacts Deter communication.
• 📵 Ignoring PIN-Code: After 3 incorrect attempts SIM It will be locked and it will be possible to unlock it only with PUK-code.

After installation SIM phone says, "Put in." SIM-map, but it's in place, try it:

1. Wipe the contacts of the SIM and slot with an alcohol napkin.
2. Insert the card into another phone – if it doesn’t work, the problem is with the SIM.
3. Reset network settings in Settings → SIM-maps and mobile networks → Reset.

FAQ: Answers to Frequent Questions