[29083011397778]

It's something they still push aggressively - on Android. For iOS, I believe they use iCloud, and only iCloud; this means you can switch between Android handsets, or Apple handsets, but not Android to Apple (or vice-versa).

Note that this is based off what I've seen and heard from others, however - I've never actually owned an iPhone to test this.

[dartharva]

And the backups are not inter-operable. A backup taken on Android cannot be transferred and restored on an iPhone, and vice versa.