Mobile phone lost

On Tuesday evening on my way from home to Hilton I lost my mobile phone Sony Ericsson V800 in a taxi. I really suspect the taxi driver. Compared to so many other of his cash-hungry colleagues, and even of the same cab company, he was waaaay too sincere and "nice", but I'm not intending on letting him have it. Will try search it using GPS through the police... hope it'll work.