Is the Android truly open source?

“Point is, from a software (app) developer standpoint, the
platform is open source. But that’s once it’s already installed on
a handset. And after talking to a friend who’s a sometime app
developer the other day, I realize it’s far easier to get an app
approved for Android than for the iPhone. But from the pre-phone
side of things – you know, the part where the actual Android
software is developed before being loaded onto handsets – Google
has a very tight hold, despite the Apache 2 license.”

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