One of the easiest ways to check the year of manufacturing, of a phone, is via the box. The sticker containing the pricing information of the phone also carries the year it was manufactured in. Another way to know the manufacturing date of your phone is via the Settings App., The year and month your phone was manufactured are encoded in the serial number. Use the following steps to find the serial number on your phone. Swipe down from the top of the screen. Tap the gear icon in the upper-right corner to open the Settings menu. Tap About Phone. Check the serial number., Way 1: Dialing *#0000# to view the version, the manufactured date, and Phone model Way 2: Dial *#197328640#* or *#*#197328640#*#* in your Dial Pad. It Will open the Service Menu. Select the Menu, Here is how you can check the manufacturing date of a Samsung Galaxy device. You can try other options too. Open your phone’s dialer and type the following code: *#197328640#*. In case it does not work for you, try this one: *#*#197328640#*#* . This will open the Service Mode menu on your Galaxy device., Knowing the manufacture date helps users identify whether their device is still supported, eligible for updates, or needs maintenance. To find the manufacture date, you may need to refer to specific identifiers within the device’s serial number or visit the Samsung website., At the top of this list, you'll find the "General Info" section, which includes entries for your device's country of origin and manufacturing date, as well as the status of your phone or tablet's Knox counter..