苹果刚刚公布了iPhone固件3.1.3版，可应用于iPhone和iTouch，本次更新主要修正了 iPhone 3GS的电池电量精密度问题，并且修复了日文Kana键盘崩溃的问题。
详细的更新如下：• Improves accuracy of reported battery level on iPhone 3GS
• Resolves issue where third-party apps would not launch in some instances
• Fixes bug that may cause an app to crash when using the Japanese Kana keyboar
支持手机• iPhone (all models)
• iPod touch (all models)
3.1.3版固件尺寸300MB，越狱用户请勿使用。
