What happened to your old phones? I believe that some people are hung up for sale, and some people put drawers to eat ash. Nowadays, there is a kind of business of disassembling and "mounting" old mobile phones on the Internet, and an old mobile phone of tens of yuan can sell for hundreds of yuan in an instant.
For example, some antique Android phones, the first picture is HTC, the second picture is Huawei P9 Plus. Now this brand of second-hand mobile phones is not worth anything at all, and most of the models used to mount are broken mobile phones, it does not matter whether the color is good or bad, and the value itself is even lower than negligible, but after it is disassembled and framed, it has quite a "work of art" atmosphere. However, these wooden frames are not vulgar, not only the use of imported wood + traditional mortise and tenon process of the top solid wood photo frame, and each base plate is an original design and has copyright, a day can only do two mobile phones.
In addition to antique Android machines, there are Apple mobile phones can also be mounted, probably before the iPhone4s, because the iPhone 5 and later models are currently OK as a backup machine, but the previous models of the iPhone 4s are too old, and the backup machine is enough to choke.
Of course, the biggest profit is still the antique functional machine, such as the above two Motorola E398 (one black and one white) second-hand bad machine price added up to forty yuan, but after disassembly and mounting can be sold to four or five hundred yuan, a full tenfold.