To take advantage of a Tello coupon code, simply paste it into the "Coupon Code" field of the checkout page when shopping for a device or signing up for service. The coupon will be applied to your order total when you proceed to the next page to review your order. For plan coupons, you will get a confirmation message that tells you the promotional offer has been applied and shows you its details.

Sign up for the Tello newsletter to receive details about promotions and special offers for both new and existing customers. Visit the "Offers" section of the Tello Blog to find coupon codes for devices, plans and additional services, as well as a variety of limited-time deals, like discounts on international calls to some countries. You can also find coupon codes and other promotional offers on Tello's Facebook and Twitter pages.

Tello offers free USPS shipping on devices and SIM cards, plus a 30-day warranty period on all mobile phones sold on its website. To take advantage of it, just contact their customer service to receive a prepaid shipping label by email. You can either opt to receive a refund or exchange your device for another one.

You can contact Tello's customer service team by filling out the form located at the "Contact" option of the "Support" menu tab on their website. You can also contact them by phone by calling 611 from your Tello phone, or 1 866-377-0294 from within the United States and +1 678 306-1436 from outside the country. Their customer service department is ready to help out 24 hours a day, 7 days a week.