For the 15186 2.5G portion of the test suite you need MDTTM-DATA-EGPRS-ATT (entered in Test Manager)
You will also need passwords licensing the underlying test pack: MDTTM-DATA-EGPRS-SW(entered in Test Manager)
Additionally, please make sure that your fader has the following license options:
For A304 & A604:
Primary Fader:
AWGN
System Option
Secondary Fader:
Secondary option
For all other platforms (one fader only):