By AppleInsider Staff

Published: 09:20 AM EST

Apple early Friday morning released the much-anticipated iPhone Software 2.1 Update recently billed by company chief executive as a "big update" that fixes "a lot of bugs."

What it fixes

A page dedicated to the release on Apple's website details a dozen major enhancements including:

• Decrease in call set-up failures and dropped calls.


• Significantly better battery life for most users.


• Dramatically reduced time to backup to iTunes.


• Improved email reliability, notably fetching email from POP and Exchange accounts.


• Faster installation of 3rd party applications.


• Fixed bugs causing hangs and crashes for users with lots of third party applications.


• Improved performance in text messaging.


• Faster loading and searching of contacts.


• Improved accuracy of the 3G signal strength display.


• Repeat alert up to two additional times for incoming text messages.


• Option to wipe data after ten failed passcode attempts.


• Genius playlist creation [Illustrated by one reader] .

How to install



Before installing the update, make sure you are using iTunes 8 [Download Link], then connect your iPhone to your computer.

• When iTunes opens, select your iPhone under Devices in the Source List on the left.


• In the iPhone Summary pane, click Check for Update.


• Click Download and Install. Do not disconnect your iPhone until the update has finished.

Security fixes

iPhone Software 2.1 also patch six security vulnerabilities.

• An application may be able to read another application's files.


• Multiple vulnerabilities in FreeType v2.3.5.


• mDNSResponder is susceptible to DNS cache poisoning and may return forged information.


• Predictable TCP initial sequence numbers generation may lead to TCP spoofing or session hijacking.


• An unauthorized user may bypass the Passcode Lock and launch iPhone applications.


• Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution.

Other fixes

Some of the other enhancements and observations reported by readers thus far:

• No sign of background push notification or turn-by-turn GPS support.


• The texting memory leak problem seems to be fixed.


• Apps are running a lot faster.


• No scrolling lag, faster launching of SMS app.


• New "3G" logo in the menu bar sans box.


• Updating applications keeps their icons in place on the home screen.


• App syncs still sluggish compared to media syncs.

Readers are encouraged to share their own discoveries in the AppleInsider forum thread for this article.