My o2 Details using Opera Mini 6.1

Okay, I have a Nokia C5-00.2 smartphone, I have Opera Mini 6.1 installed as well as the pre-installed browser.

Now I can view my o2 details by using the pre-installed browser and pressing the o2 on the bottom right hand side and it can let me view my details, but my question is why does it not do the same when I view the same page using Opera Mini 6.1 on my phone?

The thing is I don't require to sign in for this when using the default pre-installed browser, so obviously the server is getting it's details from either my sim card or phone, so I would have thought that I would need to sign in to see the details when using a computer, but I didn't think there was a need for anything like that when using the phone due to it working fine with the default browser.

It lets me into the first page, but when I click on My O2 it says " It Looks Like Your Using a Wi-Fi connection, it also says for Pay&Go customers which I am, that they are working on it, and you can still access My O2, but you will need to switch off your Wi-Fi first.

But the thing is I don't have Wi-Fi on that particular phone, well not as far as I know anyway as I don't see any settings for it anywhere on the phone or booklet.

So at the end of the day I can view it correctly with the built in browser but not with Opera Mini 6.1, this issue is the same using Firefox PC browser!

Anyone shed some light on this please, thanks.