@solorize
Can you confirm you have the settings 'GSM auto (PRL)' and 'WCDMA preferred' on your Desire S? Mine doesn't have either.
On mine, the only available options are 'WCDMA only', 'GSM only' and 'GSM/WCDMA auto'. 'GSM only' is very different to 'GSM auto (PRL)'.
Edit: Just realised you're talking about the settings accessed via Engineering mode. I didn't follow the link in your post.
Can you confirm you have the settings 'GSM auto (PRL)' and 'WCDMA preferred' on your Desire S? Mine doesn't have either.
On mine, the only available options are 'WCDMA only', 'GSM only' and 'GSM/WCDMA auto'. 'GSM only' is very different to 'GSM auto (PRL)'.
Edit: Just realised you're talking about the settings accessed via Engineering mode. I didn't follow the link in your post.