A:AnswerThank you for reaching out. Additional handsets are being sold separately with the retailers. We would kindly recommend you to look for the part number KX-TGFA51.
A:AnswerThank you for your interest in our products. The KX-TGE432B has two handsets and the KX-TGE633M has 3. The units have a different design as well.
A:AnswerThank you for reaching out! The unit works with landline. For VoIP services, please contact the provider, as they more information about installation requirements.