If you want to update the bootloader with JTAG, use the .rom-files.
If you want to update the bootloader itself, use .tft-files.
The 806MHz-bootloader will run on Trizeps 5 modules with 806 speed-grade. The 624MHz-bootloader will run on Trizeps 5 modules with 806 and 624 speed-grade.
View the serial-number-sticker for speed-grade information.
Example:
21020.C806.R128.P32
Downloads
Release Notes:
806 MHz:
624 MHz:
uLoader: