Woof Kirk (Bames Jond 007.314)
Seems to work on Austrian Phones in Austria that are on T-Mobile's German WIFI Network. If in Austria on phone bought on ATT's USA Network, which works on any Austrian WIFI, then it doesn't work on FRITZ! Extender 600. Likewise, if you have a phone bought in USA, & is on ATT Network, AND it will work on the T-Mobi