XperiFirm Tool v4.9.1 is an application which allows you to download the current firmware for all Sony/Sony-Ericsson, Xperia-line Smartphones, tablets, and accessories running Android OS (except really old ones).
- Windows XP SP3: .NET Framework 4.0 should be installed
- Windows Vista/7: .NET Framework 4.6 RC should be installed
- Windows 8/8.1/10: .NET Framework is already pre-installed
It is also recommended to download and install Java Runtime Environment (JRE) on your Computer.
Credits - XDA
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