For those of you who want to install kernel/ROMs on your rooted HTC Evo 3D with HBOOT 1.50, you would have to launch Recovery from fastboot in order to flash kernels.
Well, that requires a connection to your computer but there’s a better way to do it without your computer by using the Flash Image GUI app. This app allows you to install kernels then reboot into your Recovery to flash the ROM.
Step 1. First, download FlashImageGUI.apk and install it using a file browser app such as ES File Explorer.
Step 2. Run the app and choose “Yes” when the warning sign appears for “Internal Memory Unlock Confirmation”.
Step 3. Choose “Browse”.
Step 4. Find the ROM or Kernel zip file you want to install.
Step 5. If you get a warning sign that says “Selected File Size Is Too Large”, just select “Yes”.
Step 6. When that’s done, choose “Flash Image” to flash the kernel. Note, this will flash the kernel only even if from a ROM zip file. You can reboot to enjoy your new kernel (if it’s kernel only) OR you will need to reboot into Recovery to install the rest of your ROM (as this app only flashed kernel of the ROM).
Step 7. You should get a message saying the image has been successfully flashed.
Step 8. Choose “Recovery Reboot” if you are installing a new ROM.
Step 9. When in Recovery, you can install the ROM as you usually do. In this example, I am using TWRP Recovery. Make sure you do a Wipe if flashing a new ROM (which I forgot to do in the video tutorial).
Step 10. After reboot, you should find that you’ve successfully installed a complete kernel/ROM without using your computer. Yey.
Credits – Link
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