I lost my phone 07515881475 how can I find it? Thanks

If you did not have find my iphone activated, you don't find or track it.

http://www.apple.com/icloud/find-my-iphone.html?cid=wwa-us-kwg-features-com&sicl ientid=6381&sessguid=263ff329-9d35-433f-87a2-dee88a170fcd&userguid=263ff329-9d35 -433f-87a2-dee88a170fcd&permguid=263ff329-9d35-433f-87a2-dee88a170fcd

If you configured Find My iPhone on iCloud, you can log into iCloud and try to locate it.

If not then there is nothing you can do but start looking for it.

Allan