However, if you’ve been following Android platform development news lately, you may have heard of something called the trunk stable project. Without getting too technical, the way that Google develops Android has significantly changed. The first Android version to be released as part of the trunk stable project was Android 14 QPR2 back in March, which is why that release used a very different build ID naming scheme. Instead of having build IDs that started with the letter “U” for Upside Down Cake, Android 14 QPR2 had build IDs that started with the letter “A.”