Sharing my personal experience and looking forward to explore more options! Thanks!
The all new Cashify App (https://play.google.com/cashify) is quite amazing. Caught my attention during the recent buzz about their exchange programmes. I had a Samsung Galaxy Grand Duos which is more than two years old and I was looking for a right platform to sell it for the best price. I tried downloading the app which is only available for Android OS as of now and might be available for iOS soon I guess. Frankly speaking, I was quite amazed with what it does. Introduced by ReGlobe - a firm that buys old and used gadgets through their buyer network, Cashify is an all star that offers convenient, secure, fast & easy way of selling old gadgets. You get a price quote within a fraction of seconds once Cashify finishes to diagnose the mobile automatically. It's your mobile's personal doctor and tops the charts of my favourites' list. I got INR 4200 for my phone which was higher than what the other portals were offering! Also a free pick up of phone in addition. It's a must try! I am sure everyone will enjoy the steps that are included in the self-diagnosis process! Views are my own! Thanks!
I tried the Cashify app as well to sell my Samsung Galaxy. Before trying the app I had gone to a shop owner who offered 12,000 for the phone. Then I downloaded the app as recommended by my cousin. What I really liked was that it was super easy to use- it was an automated step by step algo that took barely 60 seconds- the app checked things like my phone's wifi, sound etc and gave me an instant quote of 16,000 and change. There was also an option to schedule a pickup from my phone. Very convenient, highly recommend the Cashify app- super time saver.
I would also suggest you good site for selling used mobiles. The site is Atterobay, its quite good and give you good price for your old gadgets. Also they will pick your device from home, no need to go anywhere. Just fill all details on their website and follow-up. Their will also process your payment fast.