spa508 firmware upgrade failed

[Sage Major]

I bought a spa500ds and need to upgrade the firmware on my 508G to use it.

When I try to upgrade to 7.5.4, or 7.5.3 I get a failure.  I was able to upgrade to 7.5.1a fine.  All firmware was downloaded from cisco this morning and unziped

I see my tftp server giving the file.

I get upgrade failed: 12. corrupt file in my syslog

Any idea where to look next?

[Joao Oliveira · Accepted solution]

It states on the release notes of 7.5.4, that upgrading from 7.5.1a you should first upgrade the phone to 7.5.2b.

Have you done this upgrade step?

Joao

[Sage Major]

That was it.  I missed that in the docs, thanks