CentOS - Feb 2014 - usb umts stick recommendation for centos 6

Hi,

we have a DSL outage in our office, which will last for one week.

So I have to use an usb umts stick, can someone recommend a stick / 
provider for germany?

Maybe which works out of the box?

I know O2 has explicit Linux support but only Fedora 16 and up....

Thx
Rainer