I am having this problem. I have downloaded the PD15DIAG.ZIP file and placed in on a sd card by using my laptop. Then placed the sd card into the phone and press the power button the start the hboot and the phone runs through the check and goes right back to the reboot screen. Is there another way of getting the file onto the phone? What other options are there to put the ROM back on the phone?
yes fastboot
Rename the downloaded stock rom "StockRom.zip" (if extensions are hidden, rename it "StockRom").
Place the downloaded stock rom zip file in your platform-tools directory.
Download the attached file "fastboot.zip. In the zip archive there are three folders, "windows", "mac", and "linux". Extract the file from the associated with your operating system and place it in platform-tools directory.
In command prompt, type the following command to reboot into bootloader:
Code:
> adb reboot bootloader
Make sure your device is recognized by typing the following command.
Code:
> fastboot devices
If you device is recognized, it should return a serial/model number.
Code:
> fastboot oem rebootRUU
Your phone should now reboot into a black screen with a gray/silver "HTC" logo on it.
Next we flash the Stock Rom. This may take a few minutes as it transfers the file to the phone then attemps to update (downgrade).
Code:
> fastboot flash zip StockRom.zip
In rare cases the flash stops and the user gets a warning to repeat the flash immediately - no panic, just run the " fastboot flash zip StockRom.zip" (only this command, not the rebootRUU one) again and it will work.
When it finishes, wait a minute or two (just in case) then reboot your phone by typing:
Code:
> fastboot reboot
After booting into Android 2.2, DO NOT update the OTA that is around 70MB. That is the update to Gingerbread. There is one update that will come before that, that is a lot smaller in size, which is the WiFi-Calling update - that update is okay to install.