Playing Terraria online on Android.Yes, you can play Terraria online on Android, but only as a local multiplayer solution through WiFi. There is no online with remote servers support like there is on PC. MULTIPLAYER -- Local WiFi games support up to 4 players cross-platform on any mobile device! - Description page on Google Play. As you can see below, the developer created this feature only for the WiFi devices. If you need additional questions, use the following email to contact the developers: Mobilesupport@505games.com
The Terraria Server Client accesses the dedicated server software already provided by the creators of Terraria and allows you to create your server, send commands to your server, edit files such as the banlist.txt and the serverconfig.txt, and more with no hassle at all!