I am using the 9 step adb root method. I get to stow 4 "adb reboot bootloader" to flash downgrade zip. I get an error message that says can not recognize file type or something to that effect. I renamed it PG05IMG.zip. I rooted my first thunderbolt no problem but had to exchange. Now cant get the new TB to flash the downgrade ruu. Any suggestions. Also adb is set up properly but then it also shows my HTC phone under storage devices with a ! Beside it. But adb is working.
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