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Some Beeper users say Apple banned their Macs from iMessage
(9to5google.com)
This is a most excellent place for technology news and articles.
And also because Whatsapp was available on every platform, from the dominant ones at the time (Nokia and Blackberry) to the newcomers (iOS, Android, even Windows Phone and more obscure ones like Samsung's whatever it was called).
Samsung had bada os then worked with intel and the tizen foundation on tizen