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Why doesn’t the BlackBerry 8820 have SIP support?

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BlackBerry 8820Forget all this noise on the Internet about security concerns with the BlackBerry 8820′s Wi-Fi capabilities — RIM would never have released the device unless it was airtight (also, where were these concerns when they released the forlorn BlackBerry 7270?). However, a recent article by ITweek raises a far more interesting issue: the BlackBerry 8820′s lack of Session Initiation Protocol (SIP) support, commonly used to link with a corporate IP PBX or messaging server. RIM instead chose to support the Unlicensed Mobile Access (UMA) IP telephony protocol, which is designed to link a handset back to a mobile carrier’s network.

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