Before upgrading, selling your used ZTE device lets you earn extra cash. Factory reset it and thoroughly clean it to look new. Include all ZTE accessories and packaging. Research asking prices for your exact model to price it competitively. Photograph it working perfectly. List on ZTE-focused marketplaces like Gizmogo to engage eager buyers who know the brand. ZTE trade-in programs simplify too. Investing some effort lets you maximize your ZTE device’s resale value.