Panasonic KX-TG5428 Operating Instructions Manual page 4

Introduction
Thank you for purchasing a Panasonic cordless telephone.
We recommend keeping a record of the following information for future reference.
Serial No. Date of purchase
(found on the bottom of the unit)
Name and address of dealer
Attach your purchase receipt here.
4
For assistance, please call 1-800-211-PANA (7262).