Yeah, that calls Symbian WhatsApp reach. In fact, all major functions reach this OS (WA Web, calls, video calls, check in (the blue stripes that say the message was seen)) But not the other, such as appearance or things like that. What happens is that Symbian is now the 4th or 5th operating system in importance. First this, obviously ... Android, then IOS, Windows Phone (just now being tested for calls, others will come after you), Blackberry, Symbian, then this is divided by 2 (S40 and S60) the first get the updates first, at least until recently was so.