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緊接著 Apple 9 月 9 日的特別活動之後，Apple 為 iPhone 使用者釋出了 iPhone 2.1 版軟體。(iPod touch 2.1 版軟體更新是在 9 月 9 日釋出的。)

依據 Steve Jobs 的說明，iPhone 2.1 解決了“許多臭蟲”。Apple 提到了以下的改善內容：

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.