Can you downgrade from 2.2 by flashing?

[Vertigo1]

Given the number of little bugs and issues being reported with 2.2, I'm actually a bit wary of installing it on my phone.

I have an Orange phone which I debraded by flashing the generic ROM. I was wondering - if I install 2.2 and then don't like it, can I revert back by re-flashing the original generic ROM again or won't the installer let me "downgrade" like this?

 

[teppic74]

Normally you wouldn't be able to, but there is a special version of stock 2.1 that fakes its version as 2.2. This will let you downgrade the phone to hboot 0.80 and 2.1 (build 1.21.405.2) using the bootloader.

If your phone is an SLCD model you'll break the display by doing this downgrade.

 

[knudsen81]

Given the number of little bugs and issues being reported with 2.2, I'm actually a bit wary of installing it on my phone.

I have an Orange phone which I debraded by flashing the generic ROM. I was wondering - if I install 2.2 and then don't like it, can I revert back by re-flashing the original generic ROM again or won't the installer let me "downgrade" like this?

here is the guide [HOW-TO] downgrade HBOOT 0.92 to 0.80 again - xda-developers

 

[Vertigo1]

Ah thanks for the info but sounds a bit too involved for me. I'm not rooted or anything and was just wondering if the standard HTC flasher utility (the RUU...exe) would allow "downgrading". Obviously not.

 

[teppic74]

The downgrade itself is using a standard RUU (with a goldcard). You need to root afterwards to fix a problem with it, but then you can flash whatever you want.