For locked bootloader → HCU Client (paid) Avoid “All-in-one” sketchy tools – they often contain malware or fail midway.
If you are flashing a device to improve its performance, keep in mind the hardware limits. The Kirin 710 is a stable mid-range chip with an (4x Cortex-A73 at 2.0 GHz and 4x Cortex-A53). While it handles casual games like Minecraft or Free Fire smoothly, it may struggle with highly demanding titles like Genshin Impact regardless of the firmware used. hisilicon kirin 710 flash tool best