The Members Forum

In the continued investigation of the mysterious Windows Phone 7 phantom data usage, Rafael Rivera has managed to beat Microsoft to the punch and proclaim Yahoo email as the culprit. The mysterious 'phantom' data appeared earlier this month, using excess bandwidth on a users phone, leaving some customers with a higher than normal phone bill.

As Rafael from Withinwindows.com discovered, Yahoo's IMAP server is the root cause of the issue. As he investigated into the matter even further, he discovered that Yahoo's mail response server was sending approximately 25 times the amount of data a regular IMAP server would.

Although the communications aren't sending large chunks of data, times the number of emails you currently have in your Yahoo account, and you can easily rack up the extra few megabytes per sync.

Neowin has the details HERE!