Nano to micro sim card adapter
thingiverse
To accommodate a nano sim from my iPhone 5, I printed an adapter for my iPhone 4 using an Ultimaker. The fit is perfect and it works seamlessly for me. In case of issues, you can adjust the openscad file.
Download Model from thingiverse
With this file you will be able to print Nano to micro sim card adapter with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Nano to micro sim card adapter.