A:AnswerHello. The phone system can be used without a landline connection. You can use the LinktoCell feature and synchronize the system to your cellular phone, and use the cellular line. You can review the cell phones tested for compatibility with the KX-TGD86, on the Panasonic Telephone Cell Phone Compatibility List FAQ. -G
A:AnswerHello! The base unit, where the answering machine, needs to be plugged into an outlet, it does not run on batteries. This part alone cannot be purchased separately. -M
A:AnswerWe would need more information in order to have a better understanding of your inquiry. If you’re open to discussing it further, please contact Support Team via Live Chat on the Panasonic Website, Contact Us option, Mon-Fri, 9am-5pm EST. -M