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.
A:AnswerI have not tried it yet, but the instruction book tells you how to do it. You enter a 3-digit code and the default code is 111. You just need to change it to a number you will remember.