Declan McCullagh reports:
Like Apple and Google, Microsoft collects records of the physical locations of customers who use its mobile operating system.
Windows Phone 7, supported by manufacturers including Dell, HTC, LG, Nokia, and Samsung, transmits to Microsoft a miniature data dump including a unique device ID, details about nearby Wi-Fi networks, and the phone’s GPS-derived exact latitude and longitude.
Read more on cnet.
Elsewhere, Peter Bright writes on Ars Technica:
In contrast with iOS and Android, Microsoft says that its Windows Phone OS doesn’t create any persistent on-phone record of where you’ve been. That’s not to say that the company doesn’t collect the information at all—but the large location caches found on handsets with competing operating systems aren’t found on Microsoft-powered phones.