Galaxy S3 and S4 USB Adapter for Galaxy S3 & S4 Dock - CASE COMPATIBLE

thingiverse

This plug is compatible with the Galaxy S3 and S4 standard USB cable (see picture) and will hold the connector securely in place. I printed this with 1 shell, 20% infill and 0.2mm layer height. It should be a tight fit (in my case no glue was required) but depending on the material used it might be necessary to add a small drop of glue to keep it in place.