I am sorry if I'm being hurtful here, but you are a SERIOUSLY weak character if you don't recommend a WHOLE OS for an app. Sure - it's important, but hey, the opertaing system is on the market less than a year, when whatsapp came to iPhone OS on version 3.1.2 , it was rubbish. So , it took some time for them to enhance the app, and that's what's happening right now with WP.
I would recommend WP8 , regardless of this app.
Yes that's harsh. He was right in not recommending it.
Let me try and explain. On BBs, BBM is an enterprise grade messaging system. It may *look* like iMessage, Skype, FB Messenger, Whatsapp, Viber, Kik, KakaoTalk, WeChat or Line but it is an entriely different beast. The latter are all pretty unreliable and have dropouts and all around less reliability than BBM. Feature wise they might not be that different but reliability wise, they are worlds apart. Companies use BBM as their *primary* communication tools (they are unaffected by the BIS outages since they have their own BES servers). That's another huge difference. All the other apps (as well as consumer BIS BBM) run over a fragile backend system. BBM for enterprises (over BES) works over a super reliable system.
These things are core communication apps. If they fail, the OS is of no use. I use a Nexus and a L920 as my primary phones at all time so I'm well aware of the quality differences in the messaging aspects.
On Nexus, I have FB Messenger, Whastapp, Google Talk/Hangouts and soon BBM to reach others
On 920, there is no FB Messenger (the Messenging integration one doesn't allow for instant offline messaging), there is no reliable Whatsapp, there is no Hangouts/Gtalk and there won't be any BBM.
Its not just about Whatsapp, WP as an OS is in danger of being sidelined due to the messaging aspect. We don't have a first class experience on any of the BIG ecosystems in messaging. There are huge holes like FB Messenger, Talk/Hangouts and BBM. Whatsapp is half a hole. It is not nearly as bad on other platforms.
In terms of missing features, here is a partial list of features we still don't have (both critical and nice-to-have-but-not-essential ones)
1) Search in contacts
2) Search in messages (this is crucial)
3) Email Chat history is broken due to WP limitation (you can't mail a whole convo, it truncates it)
4) Typing notifications on the "Chats" screen when chatting with multiple (not in particular chat itself)
5) Standardised emoticons support
6) Holes in group chat functionality compared to other platforms (also crucial)
7) Ability to see status update time
8) Ability to save profile pictures
9) Audio API related issues (battery consumption which will kill your device so much faster, kills BT integration with car audio system, erases last played history)
10) Cannot attach audio and video from library
11) Cannot forward, copy or delete multiple messages
12) Media history feature broken
13) No wallpapers
14) Home screen shortcuts to specific contact chats
15) No network usage stats
16) Support for 'fast resume' WP functonality
And those are just missing features, not bugs or reliability issues they need to fix.
It's possible this all seems tiny if Whatsapp is something that you fire up once or twice a day to message International contacts but when its your *primary* mode of communication and you run a business on it, these are massive issues not just with WA, but also of the larger WP messaging scene.
Cross your fingers and hope MS sorts out the Messenger/Skype messaging mess so that MS has its own native Messaging ecosystem. Else it will be elbowed out with no one primarily catering to it (as it already seems locked out of the iMessage, BBM, Talk/Hangouts and FB Messenger ecosystems)
Skype is ridiculously bad as a text messenger and has a cluttered UI, not to mention MS still doesn't seem to get mobile messaging because Skype, like Messenger has no robust offline messaging or always on abilities to facilitate real time IM as it can for real time VoIP.