I am using Vodafone sim in my Lumia...i want to use another sim in my mobile by using it does it causes any problems for ms account store app downloads here maps mix radio.... Can i download apps games etc etc...
Are you sure for downloading apps shouldn't causes any problems ?You shouldn't see any problems. All the apps are independent of the SIM card (barring a few like Whatsapp which use the phone number as a unique ID).