How to find the production date of an Android phone

Many Smartphone owners are faced with a situation where they need to find out the exact age of the device. This may be required when purchasing a gadget secondhand, to check the warranty period, or just out of curiosity. However, manufacturers often hide this information deep in the system settings, without displaying it on the main screen.

There are several proven methods to determine exactly when your smartphone left the assembly line. Some of them are universal, others work only on devices of specific brands, such as Xiaomi or Samsung. We will look at the most effective methods, starting from simple engineering codes and ending with analysis of the serial number.

It is worth understanding that the production date and the date of first use are often different concepts. The device could lie in the distributor's warehouse for several months. Therefore, for maximum accuracy, it is better to use a combination of several methods described below.

Checking through the engineering menu and USSD codes

The fastest way to obtain technical information about the phone is to use special service codes. These commands open access to hidden engineering menu, where detailed data about the hardware and assembly is stored. To do this, just open the “Phone” application and enter a certain sequence of characters.

Unfortunately, there is no universal code for all models. Manufacturers deliberately change combinations to limit regular users' access to system settings. However, for popular brands there are standard queries that work in most cases.

Try entering the following code and click the call button: ##4636##. If the menu opens, go to the “Phone Information” section. It may indicate the battery status or the date of the last check, which indirectly indicates the age of the device. For devices Samsung the code *#197328640#often works, opening the service mode.

⚠️ Attention: Be extremely careful in the engineering menu. Changing the parameters in the “Radio Module Setup” or “Reset Statistics” sections may lead to loss of network or incorrect operation of the phone.

If the standard codes do not work, try the combination *#06#. Although it is designed to display IMEI, on some models Motorola or older HTC following the number, an additional line appears with the release date of the firmware or build.

Analysis of IMEI and serial number

Each smartphone is assigned a unique one during production identifier IMEI (International Mobile Equipment Identity). The structure of this 15-digit number encrypts information about the model and country of production, and sometimes the release date. It is difficult to decrypt it manually, but there are online services and databases.

To find out the IMEI, enter the code in the dialer *#06# or look at the sticker under the back cover (if it is removable). Also, the number is often duplicated on the original box next to the barcode. Copy the number and paste it into a trusted IMEI checking service.

Some databases allow you to see not only the model, but also the activation date of the device. This is especially true for brands Apple (although the topic is about Android, the method is similar) and some flagships Samsung, where the guarantee is tied to the first registration on the network.

The serial number (S/N) also contains an encrypted date. For manufacturers like Xiaomi or Huawei the first few characters of the serial number often indicate the year and week of production. For example, a combination of letters and numbers can mean 2023 and the 14th week of release.

Brand	Where to find the number	Decoding features
Samsung	Settings → About phone	Often an online checker is required by S/N
Xiaomi	On the box or in the "About device" menu	The serial number contains a production date code
Huawei	Under the battery or in the system menu	The SN code is used for verification dates
Google Pixel	In the system settings	The exact date is visible in your Google account

Specific methods for different brands

Different Android shells have their own unique “Easter eggs” or menu sections where production information is hidden. Manufacturers often place this data in sections related to legal information or device status.

In smartphones Xiaomi (MIUI or HyperOS shell), the production date can sometimes be seen if you quickly click several times on the kernel version or Android version in the "About phone" menu. However, more often this information is available only through special applications or decoding the serial number, since the direct indication of the date has been removed from new versions of the software.

Devices Samsung store the assembly date in the service menu, which is opened with a code *#12580*369#. If the menu opens, look for the line “SW Version” or “RF Cal”. The date next to the RF Cal often indicates radio calibration, which is done just before the phone is packaged.

Why is the RF Cal date important?

The RF Cal date (RF Cal) usually coincides with the date the device is finally assembled at the factory. The difference between this date and the date of purchase should not exceed 2-3 months if the phone is new.

For phones Motorola there is an interesting keyboard shortcut. Press the volume and power buttons simultaneously when the phone is turned off (in bootloader mode). On the screen with the Android logo, the line “Battery OK” is often displayed and below is the build date of the firmware or device in the format DD-MM-YYYY.

Using third-party applications

If the built-in methods do not produce results, specialized utilities from Google Play will come to the rescue. Applications for system diagnostics collect all available information about hardware and software, displaying it in an understandable form.

One ​​of the most popular apps is AIDA64 or CPU-Z. After installation, run a device scan. Go to the "System" or "Device" tab. The Build Date field often indicates the time the firmware was compiled. Although this is not the exact date of assembly of the case, it is usually 1-2 months behind production.

Another useful application is Phone Info SAM (specially for Samsung) or universal IMEI scanners. They can query manufacturers' databases and return the exact release date, country of destination, and even the color of the device.

⚠️ Attention: Download diagnostic applications only from the official Google Play store. Third-party sites may distribute modified versions of apps that steal your personal data.

Remember that applications show the data that the operating system provides them. If the manufacturer intentionally hid the production date at the software level, even the best application will only show the installation date of the current firmware.

Physical signs and documentation

Sometimes the most reliable data is not in the phone’s memory, but on its case or in accompanying documents When purchasing a new device, always keep the box and warranty card - these are the main sources of truth.

There is almost always a sticker with technical information on the back of the original box. Look for the inscription “Manufactured” or “Date of Manufacture”. Often the month and year are indicated there, for example: 2023.05. This date is considered the official release date of the batch.

Also inspect the phone itself. If the battery is removable, remove it. There may be a date marking underneath the battery or on the inside wall of the case. For non-removable batteries, the date is sometimes printed in small print directly on the battery case, but it can only be seen through an X-ray or during disassembly, which is not recommended.

Frequently asked questions and nuances of determining age

Users often confuse the production date with the firmware release date or warranty activation date. It is important to distinguish between these concepts. The phone could have been produced in 2022, the firmware was updated in 2023, and it was activated only in 2026. To determine the real age of the hardware, use the factory markings.

If you plan to resell the device, knowing the exact production date will help justify the price. A smartphone that has been in a warehouse for three years before being sold may have a degraded battery, even if it has not been used.

In some cases, especially with budget models from Chinese brands, date information may not be publicly available at all. Then you can only rely on the date of first activation in service centers or telecom operator databases.

Is it possible to change the production date in the settings?

It is impossible for an ordinary user to change the factory production date. It is “hardwired” into protected memory sections. However, scammers can fake the stickers on the box or reflash the device so that it displays a false build date in the “About Phone” menu.

Why does the date in the menu not match the date on the box?

The menu often displays the software (firmware) build date, rather than the physical build date of the device. The difference can be from a couple of weeks to several months. The date indicated on the original packaging always takes precedence.

Does the production date affect the battery life?

Yes, lithium-ion batteries age even without use. If the phone is more than 3 years old from the production date, the battery capacity could be reduced by 10-15% simply due to chemical degradation of the electrolyte inside the cell.

Where can I find the production date on a Google Pixel?

On Pixel devices, go to Settings → About phone → Phone information. The serial number may be indicated there. You can also view the activation date in your Google account in the devices section if the phone was registered when you first turned it on.