kapilrtn
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Galaxy S
Samsung started development on Android 12 for the Galaxy S21 series. Here is details of firmware 

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6 Comments
NabenduM21
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Galaxy S
This is not android 12,this is i think 3.5
kapilrtn
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Galaxy S
Its showing major update so i think...
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Vicky_A52
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Galaxy S
It's 3.5 update not 4.0
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ØMSūbhâsh
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Galaxy S
This is ONE UI 3.5 update. Android 12 Based ONE UI 4 and New Ui Samsung test Beta version Not Stable. So it's one ui 3.5
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billa1989
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Galaxy S
Just so you know from One Android to other. The firmware version starts with Z. Example:G996BZ.... and not X...
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kapilrtn
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Galaxy S
Let’s check how to decode a firmware version to understand its meaning in 7 steps:

For example, I’m using Galaxy S20 Ultra‘s latest firmware version G988BXXU4BTH5.

First Part ‘G988B’

The G988B is the model number of the Galaxy S20 Ultra. The last letter B stands for the international 5G variant while F used in the international 4G variant.

Second Part ‘**bleep**’

The **bleep** indicates the international or European version. It will change in the United States, South Korea, and China because of carriers use different codes in their home country.

Third Part ‘U4’

The U4 stands for Bootloader Version. According to the security policy of Samsung, you are unable to downgrade the bootloader version of your device.

Fourth Part ‘B’

The later part, B indicates Android OS. For your better knowledge, if there are you found A, then it means it is the first major Android OS update while B indicates that it is the second major OS upgrade.

When you see Z instead of A, B, C …….Y, it means this is the beta version

Fifth Part ‘T’

‘T’ is the eleventh letter in the code. This shows the current year of the firmware. In detail, 2016 has P, 2017 has Q, 2018 has R, 2019 has S, 2020 has T, and 2021 will have has U.

Sixth Part ‘H’

The next letter ‘H’ indicates the release month of the firmware. A stands for January, B for February, and will be continued.

Final Part last ‘5’ number

The last ‘5’ number of the firmware show how many times the firmware has build. With the last letter, you can know how many times the firmware was built. This update built 5 times.