Hi everyone. This is a quick guide for anyone interested in buying a new Pre3 and making it work on the AT&T network in USA. Hopefully this will help demystify the process and encourage you to try WebOS off-contract for all the right reasons!
I used to own the Pre- from Sprint, and I think I had about 10 of them warrantied at the Sprint store for various hardware malfunctions. I loved that phone, despite its underdog status, primarily because of WebOS. I jumped ship when my last Pre broke, buying a Lumia 900 on AT&T. Well, years later, the Lumia fails to charge and Microsoft has cancelled McLaren Windows phone release this year. I saw the Pre3 unlocked on ebay for $160 and chanced it.
1. Pre3 arrives, I take it to AT&T store and have my SIM data transferred and the phone activated at no charge. It now takes calls and does SMS. No charge for activation. I verified that the unit connects HSPA+ and download speeds are consistent with capability. Wifi works with WPA2-based wireless-n (forgot what frequency exactly).
now time for the fun stuff
2. Downloaded to my PC the WebOS quick install software (https://github.com/JayCanuck/webos-quick-install)
3. Turned phone into developer's mode (type "webos20090606" in the JustType header")
4. Downloaded the gmail sync fix ([Patch] Google sync https fix (unknown error on sign in))
5. Downloaded the app catalog certificate expiration fix
-- (from this thread: App Catalog - Root certificate fix for WebOS- A MUST FOR EVERYONE)
-- (from this link: https://www.dropbox.com/s/pia7xi5wbd...date_3.0.0.ipk
6. Downloaded the google maps app that is still supported (http://www.webosnation.com/sites/web..._0.3.3_all.ipk)
plug phone in
7. choose "just charge" and run webOS quick install
8. push green "+" sign to include the above downloads
9. restart the phone
10. bask in the glory that is a working webos phone
hope this clarifies things for anyone