If I sign up for with YND, do I no longer need my contract with NTT or Docomo (or any other phone services?
A. YND possesses its own phone line from a communications company that has a communication license from the Ministry of International Affairs and Communications just like NTT or Docomo, but as with KDDI or Nippon Telecom, the phone lines that go to your home phone or to your cellular phone are dependant on NTT or Docomo (or other cellular services). Therefore, even when signing up with YND, you still need the contract with NTT or Docomo etc.