Lost iPhone 4 in Limerick on Paddy's Day/following morning

Lost my iPhone 4 in Limerick city, between Burger King in the city where I flagged down a taxi, and my front door in Raheen :-( It's possible it was dropped in taxi when paying the driver as a man who said he was a taxi driver called one of my contacts with my phone to say he had found it and to ask me to call it to arrange collection but the phone has been switched off ever since (and for some time before as I had tried it for a while). It's possible the battery went dead. The taxi driver that dropped me home that night was of Asian origin and was driving an old car, possibly Toyota Corolla or similar. The information on the phone is very important to me as I had not backed up the phone in a long time and there are many photos etc of sentimental value. If anyone has any information it would be great to hear from them. Thanks.