Yahoo responsible for Windows Phone 7 Data Over-usage: WP7 Phantom bug | Buzz Biz News

Yahoo responsible for Windows Phone 7 Data Over-usage: WP7 Phantom bug

Microsoft’s Windows Phone 7, officially unveiled in October 2010 worldwide is a newly developed mobile OS. It is in initial stage currently, a bug ruled out and causing problem to users.

A blogger, Rafael Rivera blogged at about a bug in Windows Phone 7 and discovered that yahoo is behind it.


The Yahoo mail is responsible for the Windows Phone 7 phantom bug.  It is one of the worst Windows Phone 7 bugs which caused WP7 devices to leak at least 30-50 MB of data daily, but Microsoft quickly found the source of the problem.

On January 20, Microsoft issued a statement in its press release: “We have determined that a third-party solution commonly accessed from Windows Phones is configured in a manner that potentially causes larger than expected data downloads.”

Earlier, Microsoft confirmed the bug and found that it has nothing to relate with WP7 and it was due to a third party developer, but didn’t publicize its name. Later, Microsoft announced that the Bug was instigated by Yahoo mail services on WP7.

The problem was in the Yahoo IMAP services (winmo.imap.mail.yahoo.com) that incorrectly synchronize data between Mail Server and client. Microsoft is working with Yahoo to roll out a fix in coming weeks.

“Tens of millions of people check their Yahoo! Mail from their mobile device each day and we know they want their mobile mail experience to be fast, rich, and real-time. While our default settings on all mobile platforms realize this approach, we have determined that inefficiency exists in the synchronization of email between Windows Phone Mail clients and Yahoo! Mail which can result in larger than expected data usage for some users. Microsoft and Yahoo! have worked together to identify a fix, which will be rolled out in the coming weeks. In the meantime, Windows Phone 7 customers can mitigate this issue by changing their settings to reduce the frequency of Yahoo! Mail updates. This does not impact any other phones, and we apologize for any inconvenience this is causing to users.”

Microsoft and Yahoo immediately announced a manual fix:

  1. On the Start screen of Windows Phone 7, click on the arrow at the top right
  2. Choose “Settings” from the app list
  3. Choose “email & accounts”
  4. Choose “Yahoo! Mail”
  5. Click on the setting under “Download new content”
  6. Select a less frequent setting. If you are using the default setting (every 2 hours), change this setting to ‘manually’
  7. Click on the setting under “Download email from”
  8. Select a shorter time range. If you are using the default setting (the last 2 weeks), change this setting to ‘the last 7 days’

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