Install original stock firmware (in .FTF format) to upgrade, downgrade, or unbrick a device.
Here's a step-by-step guide on how to use Flashtool 0.9.13.0: flashtool-0.9.13.0
: This version introduced full compatibility for all 2013-era Sony devices, including the Xperia Z , Xperia ZL , and Xperia Tablet Z . Install original stock firmware (in
As a Java application, Flashtool 0.9.13.0 is sensitive to JRE versions. Modern JREs (Java 17+) often break the interface rendering or file handling logic. This version performs optimally on legacy Java 6 or Java 7 environments, necessitating virtualization for modern archival use. including the Xperia Z
To utilize this legacy tool today, a user must: