1. In Android 4.3, there is no facility to Select USB Mode for Synchronised with Desktop application such as Handy Safe etc. Snapshot attached for more info. 2. In Android 4.3, message font size can not be set in tiny size as System font. It's too big font size in message although selected minium size. Single message covered whole screen of mobile. Snapshot attached for more info. Kindly , provide above facility in Android 4.3 as it's earlier versions.