Activate computer code:
1. Sign in to your account at http://play.google.com/redeem or create a new one.
2. Enter the card number and click Activate (Redeem)
Activation from an Android device
1. Open the Play Market app.
2. Click "Activate Promo Code" (Redeem)
3. Enter the code and click "Send"
Google Play gift card $ 25 (US).
Activation is only for a US account (you can change the region from Russia to USA).
The code comes instantly.
*** Bonus 3% for positive feedback:) ***