Why it’s important to distinguish the new Xiaomi from the rebuilt
Buying a Xiaomi smartphone in the secondary market or even in official stores sometimes brings unpleasant surprises. Under the guise of a new device, you can sell a refurbished device - a phone that was previously used, had defects, but was repaired and diagnosed. These devices are cheaper by 20-40%, but their resource and reliability is questionable.
Xiaomi does not officially sell refurbished smartphones in Russia or the CIS countries – all of these devices come to the market through dealers or gray schemes. This means that they are either not guaranteed or only valid from unofficial dealers. Meanwhile, even a visually perfect Redmi Note 12 or POCO X5 can hide a replaced battery, soldered contacts or traces of liquid under the body.
In this article, 7 working ways to distinguish the new Xiaomi from the restored one, including IMEI check, firmware analysis and hidden factory tags, all methods tested on models from 2020-2026 and do not require special skills.
Verification of packaging and configuration
The first thing that comes out of a refurbished smartphone is the box and its contents, and Xiaomi uses several types of packaging, but they all share common features of originality:
- 📦 Film on a box: New smartphones are always sealed in factory film with the Mi logo or Redmi/POCO. On the restored devices, the film is either absent or glued curved (with bubbles or tears).
- 🔖 Serial number: At the bottom of the box should be pasted sticker with IMEI and SN (If the sticker is missing or overstuffed, it's a reason to be alert.
- 🔌 Complete: Refurbished smartphones are often sold without a charger, cable, or even a tray clip SIM-Official equipment is always full (except for the Mi A series, which were sold without charging in some regions).
Pay special attention QR-You can scan it with the Mi Home app or any other code. QR-The reader, he's going to redirect you to the official page of the model, and if the code leads to a third-party resource or is not recognized, you're looking at a fake or a recovered machine.
⚠️ Warning: Some vendors repack refurbished smartphones into new boxes from other models.Always check IMEI on the box and in the phone settings (more on this below).
Verification of IMEI and serial number
IMEI (International Mobile Equipment Identity) is a unique identifier for a phone that allows you to track its history. To verify the originality of Xiaomi, follow the following steps:
- Dial on the phone keyboard *#06# - will appear on the screen IMEI (one or two for devices with two SIM-map).
- Compare it to the number on the box and under the battery (if the case is removable).
- Check the IMEI on the official website imei.info or through the service Mi Verify.
What to look out for:
- 🔍 If IMEI The 86 is the Chinese version of the phone (possibly brought in the gray way).
- 🚫 If IMEI Undetected or gives an error "Invalid" - the phone is either restored or with fake firmware.
- ⚠️ If the activation date in imei.info is older than 1-2 months, the device has already been used.
| Sign. | New phone | Refurbished phone |
|---|---|---|
| IMEI matching on the box and on the phone | ✅ Yes. | ❌ No or partial. |
| Date of first activation | Coincides with the date of purchase | Older by a few months/years |
| Status in the IMEI database | "Clean" (clean) | "Blacklisted" (blacklisted) or "Unknown" |
| Firmware region | Corresponding to the country of sale | Chinese/Global Firmware on the European Model |
Critical Sign of Fake: If During Testing IMEI The service shows a model different from the one shown on the box (for example, instead of Redmi Note 11, it is defined as POCO M4 This means that the phone has been reflashed or replaced with the motherboard.
Analysis of firmware and factory marks
The firmware is the digital passport of a smartphone, and refurbished phones often have flashing marks that can be detected through hidden menus.
How to check:
- Go to Settings → About Phone → MIUI version and tap 7-10 times on the line with the kernel version.
- Select All specs and find the lines: First API Level – must match the Android version when first turned on. Build Number – if it contains the words refurbished, test-keys or userdebug, the phone is restored.
Settings → About the phone → Assembly date
An additional way is to use the adb command (requires a PC):
adb shell getprop ro.miui.refurbishedIf the team returns the true phone, the phone is officially restored (such devices are sold only in some regions, for example, in Europe through Xiaomi partners).
☑️ What to check in the firmware
External inspection: traces of use and repair
Even if the phone looks like new, a close look can reveal signs of recovery:
- 🔦 Screen: Check for oleophobic coatings (repulsive fat) and swipe across the glass — if there are greasy marks, the coating is erased (a sign of long-term use) and refurbished phones often have cheap glass without the oleophobic layer.
- 🛠️ Body: Check the ends of the phone for any signs of disassembly: scratches or chips on the screws (visible in bright light); irregular gaps between the body and the screen; traces of glue or rubbing on the clips of the attachment.
- 🔋 Battery: Refurbished phones often come with non-original batteries. Check: Operating time (new Xiaomi keeps charge 8-12 hours at medium load) Charging temperature (original battery does not heat above 40)°C. Status in the AccuBattery application (if the capacity is below 95% of the declared - the battery is not new).
Pay special attention to speakers and microphones. Recovered phones often have sound problems due to moisture or careless repairs.
- The purity of sound at maximum volume (wheezing or distortion is a sign of wear and tear).
- The microphone when recording voice (background noise or muffling).
How to check the tightness of the body?
5. Verification through service codes
Xiaomi hides service codes in its firmware that allow it to obtain data on the operation time of components and repair history.
- #4636### - information about battery, network and usage statistics. In Battery, see Level and Health. If Health is below Good, battery is worn out.
- ##225## is an event calendar, shows reboot, update, and reset dates, and if you have records older than a week, the phone was used.
- ##6484## is a hardware component test that checks the camera, speakers, sensors, and errors in this menu indicate faults or replacements.
For models with a Qualcomm Snapdragon processor (such as POCO F5 or Redmi K60), the code runs:
##7378423##It opens the Service Tests menu where you can test:
Touch Screen (screen sensitivity)
Vibration (operational capacity of the vibration motor),
Front/Back Camera (Shoot Quality)
⚠️ Note: If the phone makes an error or restarts when entering service codes, this may mean that the firmware has been modified (for example, a custom Recovery is installed). TWRP).
6. Check through official Xiaomi services
Xiaomi provides two official ways to authenticate the device:
- Mi Verify: Enter IMEI or SN (serial number) from the box, the system will show the model, the date of production and the status of the warranty, if the data do not match or the status of "Invalid" - you are a restored or fake device.
Mi Authenticity Check
Google Play
- Scanning. QR-box-code IMEI.
- Shows the activation history and the region of sale.
- If the app gives a warning "This device has been activated before" - the used phone.
Important: Xiaomi’s official services do not work with phones imported from China (CN-suffixed models in the name), and use alternative verification methods for them, such as SGS (for certified devices).
💡
If the seller refuses to provide a box or IMEI for inspection, this is an excuse to refuse to buy, even in official stores, sometimes you come across "gray" restored phones, passing off as new ones.
7. Verification through third-party services
If the official methods have not yielded results, use third-party tools:
- 🌍 SNDDeepInfo – Shows detailed firmware information, including the date of the first download and the update history.
- 📊 IMEI.info – defines model, year of release and lock status (stolen/clean).
- 🔧 eBay Authenticity Guarantee – authentication service (works with phones purchased on eBay).
For a deep diagnostic, use the CPU-Z or AIDA64 app, which shows:
- Screen time (Screen on Time)
- Number of battery charging cycles,
- Temperature sensors (overheating indicates the wear of the processor).
If AIDA64 says Health: Poor or Wear level: >10%, the phone is definitely used.
💡
The most reliable way is to combine IMEI testing through Xiaomi’s official website and firmware analysis through service codes, and if both methods show inconsistencies, you’d better drop the purchase.