Kir Kolyshkin Голосов: 1 Адрес блога: http://k001.livejournal.com/ Добавлен: 2008-02-19 12:45:30 блограйдером Lurk

Google Nexus One radio image vs AT&T 3G

2011-03-16 01:34:14 (читать в оригинале)

I am mostly using my Nexus One here in Moscow, Russia, and have "Use only 2G networks" option turned on in Settings / Wireless & networks / Mobile networks for two reasons: first, it really improves battery life, second, my data plan is 220 RUR (about $8) per month flat rate unlimited, but shaped down to not exceed 128 kbps (so anything faster than EDGE won't improve my Internet speed. It perfectly suits my mobile needs (email, browsing, gtalk, Yandex and Google maps for traffic info and navigation, occasional photo upload), for everything else I have Wi-Fi in the office and at home.

So when updating my N1 to an alpha build of CyanogenMod 7 I flashed the latest radio firmware, version 5.12.00.08 (also known as Korean) and was happy with it. Until the day I came to US (for SCaLE) and started using my US number (naturally, by replacing my SIM card with a corporate AT&T SIM). I found out three things:

1. GPRS/EDGE from AT&T is crappy, it's barely working (at least in the areas I've been to, like LAX).

2. AT&T 3G is not working at all with this radio (version 5.12.00.08).

3. I am not able to flash the earlier radio image (version 5.08.00.04) using current ClockworkMod Recovery, version 3.0.0.5 (they dropped support for some old-style update scripts format which radio images are apparently using). I tried getting radio image from a couple of different sources (xda-developers, cyanogenmod wiki) to no avail.

So, I was aware what exactly the problem was, but didn't have enough time (or will) to solve it while in the USA.

I solved it tonight in 10 minutes, using nothing else than the phone (ie no need for a PC). Here's how (assuming you are using ROM Manager).

1. Go to ROM Manager, choose "Install alternative recovery (RA v2.2.1)". This will replace CWM 3 with Amon_RA 2 which understands old update scripts.

2. Repeat step 1 one more time (for some reason flashing for the first time lead to non-working recovery, although there's no error or warning). Do not worry, just flash it again.

3. Choose "Install ROM from SD card" and navigate to your downloaded radio image (my was in /sdcard/download). Ignore the warning about not using CWM.

4. Phone will reboot, flash, reboot, do something, reboot. If you will find yourself in some scary text-only menu, just select the "reboot" (following the on-screen instructions about how to select it).

5. Go to Settings / About, check the number under "Baseband version", it should be what you've just flashed.

6. Go to ROM Manager, select "Flash ClockworkMod recovery" to return back to CWM. You might need to do it twice, too, as in step 2.

Links to radio images:
* http://wiki.cyanogenmod.com/index.php?title=Nexus_One:_Full_Update_Guide#Flashing_Radio
* http://forum.xda-developers.com/showthread.php?t=723839

Hope that helps.

Posted via LjBeetle