You can play 1t1t by adding the server in the Minecraft launcher.
On Minecraft Bedrock Edition, open the Minecraft launcher or Minecraft app. Go to the “Servers” tab and press “Add Server.” Enter the 1t1t IP Address 159.69.204.255in the “Server Address” and the 1t1t port 19132 in the “Port.” Then press “Save” and start playing.