This is a phone stand designed for the Galaxy J5 2016.
It prints in two halves. I recommend pausing the print before the top surface is printed and filling the part with sand to give it some weight, but doing so is optional.
The top surfaces and keying might need to be sanded down for the halves to fit together nicely.
If you intend to use the stand as a charging dock, now is the time to place a charging cable in the channel at the bottom of the phone stand. Make sure though that your charging cable has a small enough plug to fit under the phone while it is placed in the dock.
After that you can apply superglue to the top surfaces and keying and glue the halves together. Avoid applying glue to the cable and cable channels so that the cable can still move freely.