I'm afraid that Virgin have discontinued it: http://community.virginmedia.com/t5/Virgin-Mobile/End-of-Smartcall-not-such-a-smart-move/td-p/306540...
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I believe it's been discontinued
Hi there Itsmhee,
As dannylau and AlexKid has stated, the SmartCall service has now been discontinued.
Smartcall, Virgin Media Cloud and Webspace closure
The above link was posted in early March when the notice was given, you may have also received a letter with the same information - which was sent around the same time.
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