[X3non]

Can we use the formatting option on smartphones with secure boot?

sure you can, but if you do not have the auth file for the device then it's best you stay away from formatting all or formatting preloader

[Jimslaw]

is there any risk of using other da for different phone with same chipset?

[hovatek]

is there any risk of using other da for different  phone with same chipset?

You'll just get an incompatibility error. Worst case scenario is the error causing the device to get stuck in flash mode. For that, refer to https://forum.hovatek.com/thread-808.html

[YOBRA100]

Tecno kc6 error "auth file needed" on sp flash tool even after loading custom da file! Is the .auth file available?

[X3non]

Tecno kc6 error "auth file needed" on sp flash tool even after loading custom da file! Is the .auth file available?

Use the auth file for f2 lte listed on page 1 OR better still flash your device using SWD tool (format all + download) @ https://forum.hovatek.com/thread-23709.html