ThierryZ9 years ago000Are the functionalities and services available and the same for both SIMs?Show in original language (German)raphaelschmidiger9 years ago+220Yep... Only one SIM can operate 4G/3G in parallel. The other is then automatically booked into 2G. Which SIM card slot can register 4G/3G is defined under "Mobile networks". Hope this helps.Show in original language (German)Comment1 comment