1und1.de Coupons are promotional codes or vouchers that can be used to get discounts on various products and services offered by 1&1. These coupons can be found on various coupon websites and can be used for a variety of deals such as discounts on DSL contracts, WLAN routers, mobile contracts, and hardware. Some coupons offer discounts on specific products like the Samsung Galaxy S24, iPhone 15, or Google Pixel 8. There are also customer referral programs where customers can earn attractive rewards for referring friends and family to 1&1's products and services. Additionally, 1&1 offers trade-in programs where customers can receive a high trade-in value for their old smartphones, tablets, or laptops when they order a new device with a 1&1 tariff. Please note that terms and conditions may apply to the use of these coupons. It's always a good idea to check the details of each coupon before use.