iPhone 2.0 firmware and IMAP IDLE

The answer is still no, firmware 2.0 on the iPhone does not appear to support IMAP IDLE. The push email feature works only with Microsoft Exchange, MobileMe, and Yahoo!. If you go to Settings > Fetch New Data > Advanced, and select an IMAP server, only two choices are given: Fetch [periodically] or Manual. No Push. This is reaffirmed by my IMAP telemetry log. Just like in firmware 1.x, iPhone's mail client never sends the IDLE command.

Since I installed the new firmware on my original iPhone, I've noticed drastic battery life reduction. Following Apple's advice, I turned off push email and saw significant improvement. With push email enabled, I had to recharge it almost daily; now my iPhone can go 2-3 days between charges, which is still more frequent than, but closer to my experience on 1.x firmware.

Comments:

It would be interesting to compare MobileMe, Yahoo, and ActiveSync. If perhaps MobileMe actually alerted the phone of new mail over the cell phone network instead of a persistent internet connection, that could have a huge affect on battery life.

Posted by Aaron Gyes on May 03, 2009 at 08:54 AM PDT #

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I currently live in San Francisco Bay Area. For the past seven years, I have been designing and building messaging solutions for Sun.

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