When I want to make a call with SIM 2 instaed of SIM 1 I just have to pull down this menu and touch the symbol of SIM 2, then go back and make the call. Is that right? So the call is done with the carrier of SIM 2 then. And making a call with SIM 1 vice verca. Is there an easyier / faster way to change the SIMs for a single call?