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Is there a way to flash a boot.img on your SD card without having to connect to a PC?

Is there an equivalent of the fastboot command?

I'm on a HTC Amaze 4G currently.

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Do you have S-OFF? Which device are you using? – varunyellina Oct 18 '12 at 17:09
fastboot flash boot boot.img Use this in fastboot mode. – varunyellina Oct 18 '12 at 17:20
HTC Amaze 4G, no S-Off, it flipped to S-On on recently trying to install a new ROM. No luck yet. I've also tried fastboot in the terminal of TWRP recovery, but it says fastboot -> no such command. – Androidian Oct 18 '12 at 17:31
From what I understand now, it seems I won't be able to flash anything without S-Off, I'll try that and see if maybe fastboot then becomes available. – Androidian Oct 18 '12 at 17:38
fastboot can't be used from the recovery – varunyellina Oct 18 '12 at 17:43

Once you have S-OFF you should be able to flash a custom recovery. Just flash one that supports IMG files, such as ClockworkMod (ROM Manager).

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I was able to install 4ext, with S-On still active. – Androidian Oct 18 '12 at 20:56
Yes that is possible, but flashing roms through recovery will not flash the boot.img due to S-ON status. boot.img has to be flashed through fastboot via pc. See my previous comments for the command to be used from your computer terminal/command-prompt. – varunyellina Oct 20 '12 at 16:28

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