How to download Android 12, will support these devices

Android 12 has been waiting for a long time, the official date for when it will be launched has not been announced yet, but it is believed that it could be launched soon. However, Android 12 developer preview has come and it is not for everyday users, because it has problems with bugs and battery. The developer preview means that app developers test it before fully releasing it. This is the reason why Google has generally made it more difficult to download Android 12 Developer Preview. The beta for Android 12 is set to launch by the end of the year 2021, which will be more special for users.
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However if you are normal with bugs and problems. If you are doing a factory reset by completely changing the settings in your phone, then you can access Android 11 again, after that you can get the developer preview. Google warns users of such users, as there is no guarantee that it will be fit for daily use in the phone.

Users should download the system image using the Android flash tool or side load an OTA using ADB commands. Google has shared files and instructions on its Android 12 site, which will help users to manually download the preview.
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These devices can be used in Android 12
For now, if you talk about using Android 12, you can use PC, macOS or Linux. Talking about the smartphone, you can use it in Pixel 3, Pixel 3a, Pixel 4, Pixel 4a or Pixel 5.

The Google Developers page states that users can install Android SDK tools and USB drivers as an option if they are using Windows. This is how you can install:
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The first thing to do is to click on Tools to go to SDK Manager in Android Studio.
Then click on the SDK Tools tab.
Select the Google USB Driver and then click OK.
Proceed to install the package.

Using the SDK Manager helps users to keep the driver up to date. This indicates when your current driver is getting old.
Download the developer preview OTA image for your device.
Connect your phone to your computer.

Reboot into recovery (via ADB / USB debugging or key combination) and enter in sideloading mode – Power + Volume opens the Recovery menu. Scroll through the volume key ‘Apply update from ADB’ and tap on the power button and select it. Check that it works after entering ‘ADB device’ in the shell or command prompt. If ADB is installed and your smartphone is in correct mode, then you have to look for an identifier for your smartphone and give information about ‘sideload’.
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Flash the OTA via shell or command prompt. Using ‘adb sideload your_file_name_here.zip’ without any quotes where the file name is the name of the OTA image previously downloaded by the user. The user will need to preview with “./” adb commands to work correctly on some platforms.

Reboot upon completion.
Google has also made DP1 available with Android Flash Tool. This has made the process very clean and simple and no tool will be installed in it. Users have to use this link. Connect your device via USB cable. After that choose the software which is to be installed and install the software in your device or follow the instruction by clicking on the link.