To play Call of Duty Mobile on mobile all that is needed is a web browser. No need to download the game and use a ton of GBs. Use now.gg to play the game on web browser for free. Just tap on the play button to get started.

Play Exploration: Warzone and 768 other games online. No download necessary - play directly from your web browser. With your friends and thousands of players from the whole world. Free.

Login into League of Legends. Hover over your profile icon (do not click it!), and you will get a pop-up that will show your account name with its tagline. EUW, for example, is the Europe West server.