As long as it is not redeemed, the code has no expiration date. Once redeemed, the validity of your Bouygues Telecom prepaid phone credit depends on the amount of the top-up:For a €10 recharge: the phone credit is valid for 2 months.For a €20 recharge: the phone credit is valid for 3 months.For a €40 recharge: the phone credit is valid for 6 months.