Recommend a good cell phone handsfree headset...
I don't need anything fancy, and I don't have Bluetooth capability. Wired is fine.
The phone is an ancient Samsung ACH-310 - it uses a standard 2.5mm headset jack.
I must have a button in the wire so I can answer the phone (or redial the last number) without flipping it open.
I hate earbuds - it must be over/around-the-ear.
It must have good sound quality - I have owned several, and all have been fair at best in this regard.
"The price of progress is trouble."
(C. F. "Boss" Kettering
"50% of the American public has below-average intelligence. 70% of the American public now has regular access to the Internet. Do the math."
The plantronics MX150 headset is one of the best in sound quality and comfort..