The main versions of WindowsHome Premium – for households, it includes Windows Media Center, Windows Aero, and support for two processors.Professional – for small and medium-sized business owners and enthusiasts. Contains everything from Home Premium, but also an encryption support system, connection to remote desktop or a domain network, and much more.Ultimate – contains everything from the other versions, but also includes advanced features such as BitLocker, AppLocker and DirectAccess. Individual versions are available in both 32 and 64-bit editions.
Indicates the size of a phone's second SIM card. Secondary SIM cards often have smaller dimensions than main SIM cards, and for some phones it is only possible to insert the secondary SIM if you remove the memory card.