huawei LUA-U21 frp lock
 

hi;
i'm trying to reset frp lock with OTSmart tool but get error

Using library Brom_DLL_v7.1522.2
Searching phone in normal mode;
[connect the phone powered off to the usb cable]
Phone detected (PreLoader USB VCOM Port (COM4))
Preparing to start flash mode;
Preparing to open COM4
ERROR: Comport open failed !
ERROR: BOOT_PHONE;


this phone mt6735 cpu

You must use PACK7 for that, FlyCaptain module

Br;)