17
May
HTC Hero CDMA Custom ROM Users - Update Your Radio Baseband For Best Performance, Reception, And Battery Life

HTC Hero CDMA (Sprint, Cellular South, etc) users using a Custom ROM, such as damageless' DamageControl or flipz's Fresh, listen up.

In order to take advantage of the latest improvements Sprint has made to the phone's ability to receive and utilize signal efficiently, updating to the latest ROM is not enough.

Radio Baseband

There is a special component outside of the ROM itself called the Radio Baseband, which ROM developers don't include (for whatever reason) into the custom ROM images, and instead sometimes provide as a separate update.

For instance, my Hero is using DamageControl 2.08.1, and its Radio Baseband version is 1.04.01.09.21 (the 9/21 seems to be the release date). As you can see, this baseband version is the same as I had in the official Hero 1.5, even though the ROM is 2.1.

The latest Radio Baseband, ripped straight out of the very latest Sprint Hero Android 2.1 update leaked a few days ago - the one that we suspect is Sprint's latest and greatest, is version 2.42.01.04.27 (apparently from 4/27).

Here is what flipz, the developer of Fresh ROM, has to say about using the latest baseband:

Flashing an updated radio will typically give you better battery life and better signal.

Updating To The Latest Radio

The update should theoretically work for all CDMA users, not just Sprint, but I can't guarantee it.

This is also a good time to mention an obligatory "doing this may brick your phone (but most likely won't)" warning.

In order to update to the latest radio image, all you need is to

  • download the radio image from flipz's post
  • copy it to your phone
  • boot into recovery mode
  • select the Apply update from .zip file or Flash zip from sdcard option, depending on your recovery image, find the radio image you just copied in the second bullet and apply it

Here is the whole process documented in the screenshots I took. Check out the before and after Baseband version fields.

Now, I'm not sure if my battery life or signal quality will improve but hopefully HTC and Sprint cooked something good.

HTC Hero CDMA Custom ROM Users - Update Your Radio Baseband For Best Performance, Reception, And Battery Life HTC Hero CDMA Custom ROM Users - Update Your Radio Baseband For Best Performance, Reception, And Battery Life HTC Hero CDMA Custom ROM Users - Update Your Radio Baseband For Best Performance, Reception, And Battery Life

HTC Hero CDMA Custom ROM Users - Update Your Radio Baseband For Best Performance, Reception, And Battery Life HTC Hero CDMA Custom ROM Users - Update Your Radio Baseband For Best Performance, Reception, And Battery Life HTC Hero CDMA Custom ROM Users - Update Your Radio Baseband For Best Performance, Reception, And Battery Life

Source: flipz's blog

Artem Russakovskii
Artem is a die-hard Android fan, passionate tech blogger, obsessive-compulsive editor, bug hunting programmer, and the founder of Android Police.
Most of the time, you will find Artem either hacking away at code or thinking of the next 15 blog posts.

  • for2nato

    if you have clockwork installed then you do have a true recovery image. clockwork just uses its own version of recovery so it can flash from within the android os. its really no different than cmupdater or dcupdater. they both work the same way just only for their respective roms and with any other recovery. put the radio img on the sdcard and power on your phone while holding down home+power. then apply the radio zip. bam your done

    • Watcher

      one quick point to what you just said i tried to enter the in recovery mode like 2 min ago all i get is stock recovery and i don't know why i will look in to some other ways to remake the custom recovery

      any other help would be nice thx

      Watcher out!
      Damage control 2.08.1 rom and loving it

      • Zach

        I had the same problem, leave the stock recovery by hitting send and then CONTINUE to hold down the home key. The HTC logo will come up and then take you to Clockwork or RA or whatever you've got.

  • Brent

    Worked fine for me, I do notice a little improvement with battery,but my signal seems to have dropped. I'm using ZenEXP Expresso ROM, it's awesome!

  • droid

    ive noticed that most of these root baseband mods will increase ur signal and speed exponentially!! and save battery life. however it appears the signal only increases when u use it....if that makes sense? for instance, i have no bars but when i make a call it instantly gives me full signal almost anywhere, or if i open the browser i get full bars and 3g instantly! and the browser is faster verified with speedtests.

  • JW_NErd

    Anyone know if this will work for Alltel Hero?

  • Sailio

    They should have the Radio "PRL" updates in Rom Manager.

    • Sailio

      Nevermind... there is no more updates of any kind...