How to accurately find out the year of manufacture of an Android phone: from IMEI to factory tags

Determining the year of manufacture of a smartphone Android may be needed in a variety of situations: from checking a used phone before purchasing to diagnosing faults associated with “aging” hardware. However, manufacturers rarely indicate this information in a visible place - you have to look for it in the system menus, on the box, or even under the battery. In this article we have collected all working methodsincluding those that only service engineers know about.

It is important to understand that year of manufacture and year of model announcement are different things. For example, Samsung Galaxy S21 was presented in January 2021, but a specific copy could have been assembled in December 2022. It is the production date of the device that we will learn to determine.

Some methods require physical access to the phone (for example, examining stickers under the cover), others work remotely - using the serial number or IMEI. We have arranged the methods from the simplest to the most time-consuming so that you can choose the best option.

1. Checking by IMEI: the most universal method

International Mobile Equipment Identifier (IMEI) is a unique 15-digit code that is assigned to each phone. Using it you can not only find out the year of manufacture, but also check the device for originality, blocking by the operator or participation in fraudulent schemes.

To find the IMEI on Android, use one of the methods:

• 📱 Dial the combination *#06# - code in the “Phone” application will be displayed automatically.
• 📄 Look at the sticker under the removable battery (if there is one) or on the phone box.
• ⚙️ Go to Settings → About phone → General information → IMEI (the path may vary depending on the firmware).

When you have the IMEI in your hands, all that remains is to decrypt it. The first 8 digits of the code (TAC — Type Allocation Code) contain information about the model and production date. For decoding, use specialized services:

• 🌍 IMEI.info —shows the release date, model, and even the country of origin.
• 🔍 IMEI24 —produces a detailed report with the history of the device (if it was used).
• 📊 SNDeeP —service for checking Samsung, but is also suitable for other brands.

⚠️ Attention: If the service shows a release date that is significantly newer than the year the model was announced (for example, Xiaomi Redmi Note 9 2020, but the production date is 2023), this may mean that the phone is assembled from spare parts or relabeled. Such devices often have problems with the battery or communication modules.

2. Serial number: where to look and how to decrypt

Serial number (S/N) is another unique identifier that often contains encrypted information about the production date. It can be found:

• 📦 On the device box (usually on a sticker with a barcode).
• ⚙️ In the phone settings: Settings → About phone → Status → Serial number.
• 🔋 Under the removable battery (on older models) or under the SIM card tray.

The format of the serial number depends on the manufacturer. Here are some examples of decoding:

Brand	Example S/N	How to determine the year
Samsung	R58M70VDD5N	3rd and 4th numbers/letters (here 8M) — 2018, May (M = 12th month in the system Samsung).
Xiaomi	9PXDU19C19	5th and 6th characters (19) — 2019.
Huawei	DUA-TL0018190012345	7th and 8th characters (19) — 2019.
Google Pixel	FA7BM031234	4th character (B) — 2022 (A=2021, B=2022, C=2023, etc.).

If your serial number does not fit these templates, try entering it on the manufacturer’s website in the support section. For example, Samsung and Xiaomi provide official tools for verifying the authenticity of the device by S/N.

3. Factory stickers and markings under the cover

On most smartphones (especially budget and mid-range ones), the year of manufacture is indicated directly on the case or under the removable elements. Here's where to look:

• 🔋 Under the battery: On older models (before 2018), there was often a sticker with a date in the format YY/MM or YYWW (where WW is the week of the year). For example, 1735 = 35th week of 2017.
• 📶 Under the SIM card tray: On some Xiaomi, Redmi and Realme there is a miniature sticker with a code, where the first 2 digits are the year (for example, 2005 = May 2020).
• 🛠️ On the motherboard: If you are disassembling the phone for repair, look for an engraving like 2021.08 (August 2021).

U Apple (yes, this is not Android, but for comparison) the production date is indicated on the SIM tray in the format XXYY, where XX is the week, YY is the year. Androiddevices do not have such standardization, so you have to focus on the brand.

⚠️ Attention: If the sticker under the battery looks suspicious (blurry font, colors do not match the original), this may indicate a fake or relabeled device. IMEI.

How to distinguish an original sticker from a fake one?

Original stickers usually have:

- Clear microtext (small letters that are difficult to fake).

- Holographic elements or a pattern that changes when tilted.

- The font and color match with other markings on the phone (for example, on the box).

Fakes are often printed on a regular printer, and the paint can be erased by rubbing with alcohol.

4. Hidden engineering menus: data for advanced users

There are hidden menus that contain technical information, including the production date. They can be accessed through special codes, but be careful: changing parameters in these menus can lead to unstable operation of the phone. Android There are hidden menus that contain technical information including production date. They can be accessed through special codes, but be careful: changing settings in these menus may cause your phone to become unstable.

Here are the most useful combinations:

• 📅 ##4636## — testing menu, where in the section Phone information sometimes the firmware build date is displayed (does not always coincide with the hardware production date).
• 🔧 ##225## —event calendar (on some Samsung shows the date of the first activation).
• 📡 ##197328640## —service menu (section Version Info may contain the production date of the communication module).

On phones MediaTek (for example, many models Xiaomi Redmi or Tecno) works code ##36446337##that opens the menu EngineerMode. Go to the section Hardware Testing → Version and look for lines like Manufacture Date.

If you are not sure what processor is in your phone, check it in the application CPU-Z (available in Google Play).

Do not change parameters if you do not know their purpose

Write down the original values before editing

Do not press buttons like "Factory Reset" or "Clear Data"

Exit the menu through the "Back" button, and not by force closing-->

5. Official services of manufacturers: database check

Many brands provide tools for checking the authenticity of devices by serial number or IMEI. These services not only show the year of manufacture, but also help identify fakes or phones assembled from non-original spare parts.

Here are the official resources. popular manufacturers:

• 📱 Samsung: support page → enter the model or serial number in the search field.
• 🌐 Xiaomi: authentication (requires entering IMEI or S/N).
• 🍃 Huawei: section "Warranty check" - shows the activation date (often coincides with the date of sale).
• 🤖 Google Pixel: verification through official support (IMEI required).

On some services (for example, at Samsung) may require entering a captcha or confirmation by email. If a site asks for payment for verification, it is a fraudulent resource!

⚠️ Attention: Data in official databases is updated with a delay. If you bought the phone very recently (less than 1-2 months ago), information about the production date may not yet be displayed in the manufacturer's system.

6. Applications for iron analysis: a quick way without codes

If you do not want to manually enter codes or look for stickers, use specialized applications. They collect data about hardware and software, including the manufacturing date (if available in the system).

The best applications for this task:

• 🛠️ AIDA64 - shows the firmware build date and sometimes the hardware manufacturing date in the section System → Build Date.
• 📊 CPU-Z - tab Device may contain information about the release date of the chipset (does not always coincide with the phone's assembly date).
• 🔍 Phone INFO ★Samsung★ - a specialized application for devices Samsung, shows the production date in the section Manufacture Info.
• 📅 Droid Hardware Info - collects data on all modules of the phone, including the release dates of the camera, battery and motherboard boards.

Important: if the application indicates that the production date of the phone is newer than the release date of its model (for example, Redmi Note 10 2021, but the production date is 2023), this may mean that the motherboard was replaced under warranty or the phone was assembled from spare parts.

Example report from AIDA64:

Android build date: Mon Oct 10 14:32:57 CST 2022
Kernel date: Thu Sep 1 10:21:43 KST 2022
Bootloader version: UFS_2021.12

Here you can see that the firmware was compiled in October 2022, and the bootloader was compiled in December 2021. This may indicate that the phone was released at the end of 2021 - beginning of 2022.

7. Indirect signs: how to determine the age of a phone without technical data

If none of the above methods worked (for example, the stickers are erased and the IMEI is not recognized by services), you can try to determine the age of the phone using indirect signs.

Pay attention to:

• 🔋 Battery condition: Go to Settings → Battery → Battery status. If the capacity has dropped below 80% of the original, the phone is most likely older than 2-3 years.
• 📦 Box design: Manufacturers periodically update the packaging. For example, Xiaomi in 2020 it switched to eco-friendly packaging without plastic, and Samsung since 2022 it has been using boxes with the inscription “Eco-Packaging”.
• 🛠️ Connector type: Phones older than 2018 years often have Micro-USBrather than USB-C. The exception is budget models of some brands.
• 📡 Support networks: If the phone does not receive signal 5G, it was most likely released before 2020 (except for some 2019 flagships).

Also pay attention to Android version “out of the box”. For example, if the phone was sold since Android 9 Pie, then it is definitely not newer than 2019. You can view the original OS version in the settings: Settings → About phone → Android version (sometimes the original firmware is also indicated).

FAQ: Frequently asked questions about determining the year of manufacture of a phone

Is it possible to find out the year of manufacture of a phone by the model number?

No, the model number (for example, SM-G973F for Samsung Galaxy S10) indicates only the series and modification of the device, but not the date of its production. However, you can find out by the model number year of announcement (for example, Galaxy S10 released in 2019), and then compare it with the production date by IMEI or serial number.

What to do if the serial number is erased or not readable?

If the serial number on the box or phone is illegible, try:

1. Find IMEI through *#06# and check it on services like IMEI.info.
2. Use applications like AIDA64 to read data from the motherboard boards.
3. Contact the manufacturer's service center with the purchase receipt (if you have saved it).

If the phone is still under warranty, the manufacturer is obliged to restore the serial number from the database.

Why do services show different release dates for one phone?

Differences in dates can occur for several reasons:

• The service checks the date firmwareand not the hardware (they may differ by 1-6 months).
• The phone is assembled from spare parts (for example, the motherboard is from 2021, and the case is from 2022).
• The manufacturer has updated the database, and the old information has not yet been deleted.

The most accurate data is usually provided by official service brand or checking through IMEI with decryption of the TAC code.

Is it possible to determine how long a phone will last by the year of manufacture?

The year of manufacture indirectly affects the service life, but is not the only factor. Please note:

• Battery: Lithium-ion batteries degrade even without use. A phone produced in 2019 may lose 30-40% of its capacity by 2026.
• Update support: Manufacturers usually provide security updates for 3-4 years from the release date of the model (not an individual device!).
• Physical wear: Buttons, connectors and screen wear out over time, regardless of the production date.

For an objective assessment, use tests like AccuBattery (for the battery) and check how old the phone is by IMEI.

What does the date in YYWW format on the phone sticker mean?

The format YYWW is deciphered as follows:

• YY —the last two digits of the year (for example, 20 = 2020).
• WW — week of the year (from 01 to 52). For example, 2045 = 45th week of 2020 (November).

Some manufacturers (for example, Samsung) may use month letters (A=January, B=February,... L=December), but this is less common.