If you are testing for research, look for these hallmark features that defined Android 1.0 (vs. the iPhone OS of 2008):
Whether you are a developer looking to test backwards compatibility or a tech historian wanting to see how far the UI has evolved, this APK represents the "Big Bang" of the world's most popular mobile OS. android 1.0 apk
However, and xda-developers forums host "System Dumps" of the RC29 build (Android 1.0). These are not installable APKs in the modern sense; rather, they are system images. If you are testing for research, look for
There are three modern reasons for this retro hunt: If you are testing for research
Today, we are used to numerical versions or dessert-themed nicknames, but Android 1.0 was so early that it didn't even have an official codename