Hello, i have the No.1 D5.

Hello, i have the No.1 D5.
ist that normal that on some apps, the connection is not working via 3G ?
e.g. Google Play music and You Tube ? Both apps working perfekt if i have Wifi
And what about the D5+ are there also restriction when using apps via 3G ? I´m planning to upgrade to the faster D5+