IOS 6.1 Updated Three Times, iTunes 11

摘要

Since the release of iOS 6.1 on 28 January, Apple has rolled out iOS 6.1.1, 6.1.2, a 6.1.3 beta, as well as an update to iTunes 11. The first of these updates, iOS 6.1.1, became available to iPhone 4S owners on 11 February in order to fix the 3G issue experienced by some users after updating to iOS 6.1. On 8 February, Vodafone had warned its UK iPhone 4S customers not to upgrade to 6.1 due to performance issues with 3G. On 20 February, Apple released another update in the form of iOS 6.1.2 for all iOS 6 compatible devices, which fixed an Exchange bug that had been spotted earlier in the month. Specifically, the release notes on iOS 6.1.2 say the patch "fixes an Exchange calendar bug that could result in increased network activity and reduced battery life".