I have an O2 contract from way, way back but, after reading through all the Volt documentation, I am still not sure whether any of the benefits of the scheme have any relevance to me. Can I "tack on" my pre-existing O2 account to my Virgin Media acco...

Calling my house number the caller hears two rings at most, followed by a burst of "static" noise. The call is then terminated. I have tested and verified this myself by calling in from my own mobile. I have also swapped handsets around and even trie...