Andrew D.
Easy and Reliable
So easy and reliable! I was able to sell my old iPhone X and get it off my hands. The app is clean, easy to use and strait forward, it guided me through the process.

Backflip is listed under Appliances & Electronics.
Backflip (backflip.com) has 213 customer reviews on Five Star Index, with an average rating of 4.8 out of 5.
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Showing 198 reviews with 5 stars · Clear filters
Andrew D.
So easy and reliable! I was able to sell my old iPhone X and get it off my hands. The app is clean, easy to use and strait forward, it guided me through the process.
david F.
Great experience and customer service
Adam
Whistle PAID ME MORE and FASTER than anybody else. Will never sell again the traditional way. 10/10 will use again!
Eric C.
Used and recommend them to friends - easy to use and I got paid fast as promised!
Katrina L.
Whistle was a great service and app to use. The customer service replied quick and was able to get me everything I needed immediately. They also paid me immediately, if you’re going to sell a device use whistle!!!!!
Leora K.
Great experience!!