Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Doesn't work
Review: Handset only works when the plug is pressed and held in place. Even then the sound quality is poor (Verizon VX cell phone by LG). It may "plug into any cell phone", as advertised but it doesn't work with ours. I frequently use a headset with a similar plug that works fine.
