Truly, the results with different open source and commercial IOS and Android offerings are not generic in their results. Purposely, we have not run into any Windows 7 mobile phone users, and the total number of workable offering on the RIM/Blackberry platform is dismally disappointing. We own all 4 platforms, but really only find "choices" in the above two platforms. Our platform of choice is Android. Why? Because Apple has the IOS so locked down to its own IOS platform especially when it comes to h.263/h.264 video, seems punitive. We're talking about their Facetime product. If you visit even the apple fan forums, they say "to video from a Windows device to an Apple device, use Skype", which is now owned by Microsoft. If you want video chat on the IOS you have to use Facetime on each end.
Wait, it's a two-way street. Google Chat is horrible on an IOS device unless you get a 3rd party application. We don't really know if this is intentional of Google's part or if Apple won't allow them access to the API's and libraries to make this part a truly integrated application. Only recently Google released a Gmail application for the iPhone, let's hope they end up getting a real chat application (with video) on the IOS. In most businesses we find Windows PC's and some Mac's but for these same firms mobile deployment we find Android and Apple. The number one simplest way to achieve a cohesive SIP audio and Video communications is, well, you guessed it, ditch the IOS platform. Reasonably there are many more open and paid alternatives for SIP and SIP Video with the Android platform.
Did we mention that among ALL the mobile OS vendors, only one has started to include SIP in the OS platform as an embedded function? Android 4.0 (aka Ice Cream Sandwich). Oh, the reason we don't push to say. "Just use Skype", is that our focus in on the enterprise. One of the issues with Skype is that it does not conform to CALEA and other FCC mandates. If any of our regulated clients were found to be using Skype in their daily business communications, it would be cause for an alarm, and most certainly be dinged on any type of technology audit. Skype does not have a centrally switched calling platform, plus their peer-to-peer connections means no digital wiretap will work or be functional. Google has been known to respond to subpoenas when properly asked.
Did we mention that among ALL the mobile OS vendors, only one has started to include SIP in the OS platform as an embedded function? Android 4.0 (aka Ice Cream Sandwich). That's right. In Android 4.0 you can supposedly use a SIP account to connect directly to your SIP platform without a 3rd part application. Since it's embedded in the OS, it surer to be more stable than an application. Time will tell since the first device is due to be released in the US sometime before the end of this year.
So if mobile communications are important to your Enterprise (big or small), have you asked or answered the question: Is your mobile phone SIP worthy?