Follow these, step by step.
1. Download Zynga Texas HoldEm Poker on you Android/iOS device.
2. Login with Facebook or any other type of account. (Guest/Zynga account)
3. Click on the Settings gear icon and choose the ACCEPT option next to Referrals.
4. Copy the code and paste, or just type it with Qwerty keyboard.
Or on a Computer Login to the Game
1. Settings (Gear symbol top right)
2. Account -> Refferrals, Press the green Accept button
3. Select the Redeem tab and enter the code X7EKV6W
If you're using a brand new account, you must play a specific number of hands before you can use the code