I have only use the mobile phone option a couple of times. Um back when I used it they would send you the code to your mobile phone and then you take that code and enter it onto the site. They might have done some upgrading to that system from the last time I used it.

I use mobile payment all the time. But I'm not sure if it works the same everywhere.
OMD is normally a French site, and I live in Belgium, so it's not far away.

What I do know is that I never use the option for more than €3,
because the other options are with another site and I don't really trust it.
If I want more Fee'z, I just do the €3 thing again.

So here is what happens when I buy. I have to send "ACCES" to 3183.
Then I get a reply in French that says I have to answer the message and send "WEB".
Then I get another reply in French that says; You're code is..."

It works perfectly well for me,
but as I said I don't know about the other site for more than €3.

Also, here's a tip; I now know what to do out of my head, so once I didn't get a
reply, while I most certainly had send my message.
So do you know what I did? I send "WEB" without getting the reply,
and it worked. Short after I received both of the messages anyway!
So that might work :)

I am not sure for I don't use the mobile option anymore.