If you own a Pixel device, sign up for the beta by heading to the official Android Developers website.
For the other devices, you will have to manually flash the beta build onto the phone.
The Android Q Beta 3 has most of the features that Google announced at the keynote save for a few.
At I/O 2019 opening keynote, Google released Android 10 Q Open Beta 3 and detailed some of the consumer-focussed features coming to the next Android version in Q3 this year. That includes live captions, smart replies, focus mode and dark theme. Google also announced the third beta build of Android Q would not only be available to the Pixel, Pixel 2, Pixel 2 XL, Pixel 3, Pixel 3 XL and the new Pixel 3a phones, but also to third-part party devices from Nokia, Oppo, Huawei, Sony, LG and more.
Here’s the full list of phones that will get Android Q Beta 3:
Asus Zenfone 5z
Essential Phone
Huawei Mate 20 Pro
LG G8 ThinQ
Nokia 8.1
OnePlus 6T
Oppo Reno
Realme 3 Pro
Sony Xperia XZ3
Tecno Spark 3 Pro
Vivo X27
Vivo NEX S
Vivo NEX A
Xiaomi Mi 9
Xiaomi Mi Mix 3 5G
Now, if you own a Pixel device, signing up for the beta is simple. You have to head over to this page and enroll your device. Then you will receive the beta build as an over-the-air update. For the other devices, you will have to manually flash the beta build onto the phone. Instructions are available on this page for specific device models.
The Android 10 Q Beta 3 has most of the features that Google announced at the keynote save for a few that are going to be exclusively released on the upcoming Pixel devices including on-device, no-latency Google Assistant.