NB: They call this an 'untangler', but this is purely preventative, and won't undo existing tangles.
Anti tangle Telephone Handset Curly Coiled Cord Untangler Device Detangler
Anti Tangle Telephone h/set curly cord Anti-Tangle Device (Untangler)
Telephone Cord Detangler 360 Degree Extended Rotating Anti-tangle Telephone Cord
Ex-Pro® Telephone Handset Curly Cord Cable Lead Anti Tangle Untangler Device 1PK
Ex-Pro® Telephone Handset Curly Cord Cable Lead Anti Tangle Untangler Device 2PK
