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Forgive my ignorance, are you a regular dev? I can update your status here.rbox said:The Team Win Recovery Project (twrp) was ported to Thunderbolt but did not have ext3 support. While some roms for the Thunderbolt will mount /system as ext4, it's actually formatted as an ext3 partition and the recovery requires ext3 support for it. I have compiled a version of TWRP that supports ext3. As usual, this should work, but I make no guarantees. And of course the source is on github: https://github.com/androidrbox/Team-Win-Recovery-Project
To flash with fastboot boot into the bootloader, run: fastboot flash recovery twrp_ext3.img
To flash with the bootloader, flash like any other PG05 image.