Age of Empires: Castle Siege

The game was turned off a long time ago, but it was fun to play on a Nokia with a Windows phone

Castle Siege is a really good RTS game for mobile where you play as an Emperor forging his empire thorough blood and glory of war. Join one of the six factions: Byzantine, Franks, Kievan Rus, Britons, Saracens and Teutonic Order. Make war on your enemies and form allies along your path. The gameplay is superb with control over ever unit of your army and the Heroes, which are the most popular Historical figures of the time, available at your command.