1.open Clash of clans and go to the in-game settings
2.Press 'link a device'
3.Enter the following code (no spaces)
recovery code
make sure to connect your village to google+ so you never lose it again google+ only supports one village per account so you will need a different Google+ account for each new village you play on other devices
to connect your village to google+ open the google+ app on your device and make sure you are logged in after this open