Help!!! Any way to downgrade radio from 2.15 to 2.05

[reekotubbs]

First let me apologize if this has been answered before, but I could not find my specific question nor answer.

I am on baseband 2.15 and am trying to downgrade to 2.05. When I try to flash the radio in zip format, I get an error stating that my os is to new and that everything after 1.5 will not be able to flash this specific radio. This is not the same as downgrading from 2.15.x.x to a lower 2.15x.x. So please don't point me to this type of example.

Does anyone know, step by step, how to get this done?

Thank you in advance.

Edit: hboot 0.97
Radio 2.15.00.09.01
S-off
Rooted via unrevoked forever

 

[MultiDev]

Newer versions of the stock ROM may not work well or at all with older radios.

You may need to rollback to 2.2 to use the older 2.xx radios. 2.05.00.06.10 came out with the 2.2 froyo rollout. The newer gingersense ROMs probably can't be used with such an old radio.

Why do you need to roll back to 2.05 anyway?

 

[reekotubbs]

Newer versions of the stock ROM may not work well or at all with older radios.

You may need to rollback to 2.2 to use the older 2.xx radios. 2.05.00.06.10 came out with the 2.2 froyo rollout. The newer gingersense ROMs probably can't be used with such an old radio.

Why do you need to roll back to 2.05 anyway?

Need to get my radio to a point where the nvm is writable.

Edit: update, got the radio to downgrade by using rom manager with clockwork recovery 2.5.0.7 and flashed radio update.zip

 

[plainjane]

It was an amend error. An old version of Clockwork - as you did - or Amon Ra would be needed to flash it. Next time you flash radios (or anything that gives you that error) you'll either have to find an edify version or downgrade/switch recovery again.

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