Thanks to the Custom ROM precisely this happens: mobiles that have not been officially updated to Android 10, have the work of independent developers to be to the last before the rest. Since the launch of Android 10 just a few days ago, only the Google Pixel and a few more have been officially updated. However, there is already a custom ROM with Android 10 for the Pocophone F1 and the Xiaomi Mi 8, Mi 6 and Redmi Note 5. And now, More Xiaomi with Android 10.
At the moment they have received an update to Android 10, officially, the Google Pixel, Pixel 2, Pixel 3 and Pixel 3a. The OnePlus 7 and OnePlus 7 Pro have also done it, and also the Xiaomi Redmi K20 Pro. And unofficially, through the custom ROMs that we mentioned, both the Asus ZenFone Max Pro have been updated to Android 10 -which was the first of all- like the Pocophone F1, the Xiaomi Mi 6 and the Xiaomi Mi 8, although exclusively in its version for India. Now, as we advanced, the Xiaomi Mi A2, Xiaomi Mi Mix 2 and Xiaomi Mi Mix 2S.
LineageOS 17 with Android 10 now available in its first version
The update -not official- a Android 10 for Xiaomi Mi A2 it's with Lineage OS 17. This will be the version that brings Android 10 to a very wide variety of smartphones and tablets, but at the moment it is in its first alpha version and the Xiaomi Mi A2 is the first to receive it. It is an alpha, as we pointed out, and this means that it is practically a AOSP version no typical customizations of LineageOS. On the other hand, it should be mentioned that the camera app does not work yet, so you have to use one downloaded from the Google Play Store.
As to Xiaomi Mi Mix 2It is also about LineageOS 17, the custom ROM that allows us to update the smartphone to Android 10. In this case, however, it is not an alpha version, not even an official version. They have taken as a base the Alpha of LineageOS 17 and have made a custom ROM that, although based on it, does not have official support from the renowned team of developers. And it has problems in applications such as the clock or SMS-type messaging, specifically with notifications.
Lastly, the Xiaomi Mi Mix 2S It has also received its corresponding update to Android 10, and also unofficially. This time it is not LineageOS 17, nor a parallel version based on this software, but a custom ROM based on the Google Pixel 3 ROM.
For Xiaomi Mi Mix 2S , Can test the Pixel3 ROM based on Android 10. We couldn't find a bug list for the ROM, but it's still wise to back up all your important data before venturing into the world of unofficial software. And with the update to Android 10 of this device you have to be a little cautious, because there is no list of errors published. So we do not know if it works perfectly or, if not, what are the faults that affect it.