Gather beads, charms, string or nylon cord, scissors, and a phone strap loop or lanyard attachment
Cut a length of cord to the desired charm size
Thread beads and charms onto the cord
Add a phone strap loop, clasp, or attachment ring
Tie secure knots at both ends
Trim excess cord
Attach the charm to the phone, case, or phone strap hole
Check that all knots are tight and the charm is secure