"Stuck at 0%": Try a different USB port, preferably a USB 2.0 port rather than 3.0, as some older Xperia chipsets struggle with the high-speed handshaking of USB 3.0. Conclusion
Before flashing, always backup existing firmware: flashtool-v5.0.1
: While powerful, the interface can be confusing for beginners due to technical requirements like manually loading scatter files. Reliability : It is widely considered the best tool for MediaTek devices "Stuck at 0%": Try a different USB port, preferably a USB 2