is smartphone tradeing a legit company?

[Gabby]

I want to sell my old phone but I'm afraid that this website might be fake. Has anybody used it? and is it safe for them to send me a check?

[dan]

Check if the business is BBB accredited; look up their social media profiles, read other customers reviews. I've never actually heard about this particular website, but there are plenty of online companies that have been around for years and have multitude of satisfied customers. I'm talking about companies like Gazelle, Nextworth, Gadget Salvation, Glyde. Their offers might be slightly lower, but at least you know you are getting paid.
Good luck!