Why can't I upgrade back to 6.1?

[Chillin]

I am using a Rogers S621.

I was running 6.1 and decided to try the official Rogers 6.0. I downgraded to that no problem. Now when I try to upgrade back to 6.1 I can't.

Everytime I try half way through the upgrade it stops and I get the message:

ERROR [270] UPDATE ERROR: The Image File Is Corrupted. Please Check Your Update Utility.

I have tried both
Kavana's: http://forum.xda-developers.com/showthread.php?t=374890
Rick's: http://forum.xda-developers.com/showthread.php?t=397845
and both do the exact same thing.

I have tried reinstalling the Rogers 6.0 and then retrying one of the 6.1 upgrades and it still does the same thing.

I have tried doing the upgrade both before and after doing an initial sync with my PC.

I have tried it with and without using SP_AllowCertificateInstall.cab http://downloads.rogers.com/wireless/products/phones/HTC/SP_AllowCertificateInstall.cab

The problem seems to be when it gets to:
"execute SPL now - allow to run JumpSPL and after this step, press center button (Continue) on your Excalibur and screen should turn nearly white"

When I press the centre button (Continue) it just goes back to my homescreen and does Not turn white. It then begins the update but, like I said, kicks me out half way through with that error message.

Ideas?

[Technology]

I am using a Rogers S621.

I was running 6.1 and decided to try the official Rogers 6.0. I downgraded to that no problem. Now when I try to upgrade back to 6.1 I can't.

Everytime I try half way through the upgrade it stops and I get the message:

ERROR [270] UPDATE ERROR: The Image File Is Corrupted. Please Check Your Update Utility.

I have tried both
Kavana's: http://forum.xda-developers.com/showthread.php?t=374890
Rick's: http://forum.xda-developers.com/showthread.php?t=397845
and both do the exact same thing.

I have tried reinstalling the Rogers 6.0 and then retrying one of the 6.1 upgrades and it still does the same thing.

I have tried doing the upgrade both before and after doing an initial sync with my PC.

I have tried it with and without using SP_AllowCertificateInstall.cab http://downloads.rogers.com/wireless/products/phones/HTC/SP_AllowCertificateInstall.cab

The problem seems to be when it gets to:
"execute SPL now - allow to run JumpSPL and after this step, press center button (Continue) on your Excalibur and screen should turn nearly white"

When I press the centre button (Continue) it just goes back to my homescreen and does Not turn white. It then begins the update but, like I said, kicks me out half way through with that error message.

Ideas?Try running that SDA App Unlock on your mobile and try running the 6.1 software again, should work again now......!

[Chillin]

Try running that SDA App Unlock on your mobile and try running the 6.1 software again, should work again now......!

Exactly what software are you refering to?

[Blackshaolin_7]

The SDA Unlock app can be located at the link below

http://www.coderetard.com/wp-content/uploads/2008/07/sda_applicationunlock.zip

If that doesn't work the link is actually on this page

http://www.coderetard.com/2008/07/14/how-to-hack-your-t-mobile-dash-htc-excalibur/

When you installed WM6.0 it most likely lock the phone up again

I originally got my information to install 6.1 on that page before I came to XDA

It should work fine after you are done

[Chillin]

Done and done.

Thanks a lot guys.

[jdoggraz]

No problem, glad everything worked out for you.