JSN-L42 (need downgrade firmware for frp)

Quote:

>>>>Reading Mobile Version Info
Mobile Phone Product Name
...
(bootloader) JSN-L42
OKAY [ 0.000s]
finished. total time: 0.000s
Reading Mobile Version Info
...
(bootloader) :JSN-L42 9.1.0.239(C675E8R1P1)
OKAY [ -0.000s]
finished. total time: -0.000s
Reading Mobile Bootloader Lock Info
...
(bootloader) FB LockState: LOCKED
(bootloader) USER LockState: LOCKED
OKAY [ 0.016s]
finished. total time: 0.016s
Reading Mobile Battery Info
...
(bootloader) 3676mv
OKAY [ -0.000s]
finished. total time: -0.000s
Reading Mobile vendor and country Info
vendorcountry: hw/in
finished. total time: 0.016s

this is my fastboot info.

mrt test point method not support for frp.