This is a very strange problem indeed.

Yesterday, I used the turn by turn navigation on my HTC Desire.

It worked fine untill I turned the navigation sound on and I could hear the directions but on top of that, I heard a strange voice (not one I have installed) reading out a message over and over again telling me to go to a certain website with some other messages.

Could this be a virus?

Any help would be appreciated.

Oh and I have a non rooted phone.

P.s. I restarted the phone and started navigation and got the same problem. The phone seemed unaffected apart from the voice.