From the latest model to older models, you can sell 2nd hand Samsung Watch or new Watch to me as both are accepted for trade-in or buyback. If you are looking for a hassle-free trade-in service, you are in the right place. Select your model to reveal my trade in / buy back quote. Sell your phone today at Mister Mobile in Singapore with confidence — clear pricing and instant payment, backed by the Mister Mobile Promise.