Any chance of clarifying all this.
I go to the link you post for Root 2 Legit (which I assume means what I want to do) and it takes me to how to root and install cupcake (which I do not want to do). I installed cupcake and need to get back to T-Mo U.S. legit.
I installed RC29, 1.0 firmware, but getting to step 2 is confusing because the link appears to be talking about installing cupcake.
http://androidforums.com/updates-cupcakes/5006-g1-t-mobile-total-newbie-help.html#post32119
All the posts on the net say "how to upgrade and downgrade."
I need to downgrade. Is there any thread that says how to ONLY downgrade.
I have the files that were posted and downgraded with the Dream file, so now I show build TC4-RC29 115247 installed.
So now what.
UPDATE: I think I see how it's done.
I simply renamed and numbered each of the OS updates and installed them in order.
E.g. gave each file a distinct name. "01 Original OS", "O2 next update" and so one.
Transferred all files to my G1 microSd chip.
Then one by one renamed each to be installed, to "update.zip"
Installed each "update.zip" file, starting with file I named "01"
Rebooted after install.
Then deleted file just installed, the one named "update.zip"
Renamed the next one in order, "02" for example, to "update.zip"
Then installed that.
Did this for all four files you provided.
I confirmed after each install that the OS had in fact been updated. It went from 1.0 to 1.1 (or builds 29, 30, 33)
Just now I installed the RC30 to RC33. "About" shows successful install to RC33.
WOOT....
Also, I now have the T-Mo menu item that says "System updates."
I assume that now I can wait for the OTA cupcake from T-Mo.
Thanks for the help!
Sidenote: was I able to do these updates because I rooted my phone, used TelNet, etc.? IN other words, can one do these updates and downgrades if they had not rooted their G1?