- 05-24-2010, 11:14 PM #2
So you have to flash the stock 2.1 firmware or is it the 2.1 update 1 ota file. And also you can do this without being rooted right. I want to flash the 2.2 update but just in case it is not final , which it seems, I want to be able to downgrade to 2.1 to recieve the official ota or official manual update.
- 05-24-2010, 11:30 PM #4
Basically, you'd have to wipe your device, and then flash the system using the fastboot method. (at least that's what I did) I have a copy of the original 2.1 firmware, which then prompts for the 2.1 update 1 OTA about 5 minutes after being installed.
I'm sure there's other ways to do it, but I did it that way because it doesn't require root.
- 05-25-2010, 12:17 AM #6
- 05-25-2010, 08:58 AM #7
- 05-25-2010, 10:33 AM #8
- 05-25-2010, 02:50 PM #9
- 05-25-2010, 08:44 PM #10
- 05-26-2010, 09:22 AM #11
- 8 Posts
I'll vouch for those instructions as well. I'm using a T-Mobile Nexus One, did not root it or unlock the bootloader and using the PASSIMG.ZIP from that link set it back to the firmware as it shipped, and it then did an OTA update to 2.1 update 1.
It's no big deal if you don't want to try doing it though, because the OTA update to Froyo final *will* work with phones that applied the leaked FRF50 update.
(There's a link from Google Support clarifying this, but I don't have a high enough post count to post links yet.)
- 05-27-2010, 08:15 PM #12