ZTE does not specifically promote a universal trade-in program for older devices on their website. However, many telecommunications companies and retailers offer trade-in programs that often include devices from various manufacturers, including ZTE. These trade-in programs allow customers to receive credit towards the purchase of new devices, which can be a great way to offset costs when upgrading. It is advisable to check with local carriers or retail stores that sell ZTE devices, as they may have their own trade-in incentives or partnerships that accept ZTE products. Additionally, consumers can explore online marketplaces that specialize in device trade-ins, as these platforms frequently accept a wide range of smartphones and may provide competitive value for older ZTE devices. For the most accurate and up-to-date information, it would be beneficial to visit the official ZTE website and look for any current offerings or announcements related to trade-in programs.