Yahoo, whose mail system has been named as the culprit of the the “phantom data” issue plaguing WP7 handsets, has claimed that the issue is a result of the Windows Phone Mail app mishandling their data, rather than their own servers.
In a statement released yesterday, Yahoo said that the way WP7 handles Yahoo’s IMAP servers was “nonstandard,” and pointed out that users of other smartphone operating systems were having no such issues.
â€œTens 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 an 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.â€
Provide the following as supporting information:
On the Start screen of Windows Phone 7, click on the arrow at the top right
Choose â€œSettingsâ€ from the app list
Choose â€œEmail & Accountsâ€
Choose â€œYahoo! Mailâ€
Click on the setting under â€œDownload new contentâ€
Select a less frequent setting. If you are using the default setting (every 2 hours), change this setting to â€˜manuallyâ€™
Click on the setting under â€œDownload email fromâ€
Select a shorter time range. If you are using the default setting (the last 2 weeks), change this setting to â€˜the last 7 daysâ€™