Android 1.5 ‘Cupcake’ update has been available for Android Developer Phone(ADP) 1 for past couple of days. In earlier post, I had mentioned about it and it’s availability at HTC site.
Please note, that the update available on HTC site is only for Android Developer Phone(ADP) 1 – HTC Dream hardware platform only and device should also have original factory bootloader (hboot 0.95.3000) or a development bootloader that supports fastboot. The update for Tmobile G1 has been rumored to be available OTA and some users have claimed to received it yesterday. But as of today, it hasn’t been confirmed to be available for all users.
There are two ways of updating developer phone 1 to android 1.5 (as described on HTC site):-
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Flashing the device using an updated recovery image (recovery-image method): This method is recommended by HTC for android application developers. It is straightforward method which requires the use of adb tool (available with Android SDK) along with device with original factory bootloader (hboot 0.95.3000)
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Flashing the device using fastboot commands (fastboot method): This method is slightly more complicated than the first one. It requires the use of adb tool (available with Android SDK) and fastboot tool. To use this method, your device must have a fastboot-compatible bootloader. Having the original factory bootloader included on ADP devices is not required.
I used the the first method to update my dev phone (ADP) and it was piece of cake (or should I say piece of ‘Cupcake’ 
) . Surprisingly, it was easier than some of the OS updates I have done over the years.
To check the steps i followed to update , please click here
Please note, these steps worked for me and it is not necessary that they will work for you. Please follow the steps at your own risk and I should not be held liable for any damages/injuries caused while following them. These steps are based on the instructions provided on HTC site.
