Bests & Worsts Reviews from Amazon

This telephone is identified as a "Landline Telephone" in the Amazon description. Fortunately, the phone does NOT require the landline connection to work as a cell-phone router, in fact there is a "Cellular Line Only" mode to customize system functionality to cell-phones, otherwise the display will remind you to "Check Tel Line" while the land line port is unused. The phone accepts Bluetooth connection from most cell phones. Panasonic details the compatible phones (most all) in a table at their site titled (search Panasonic web for...) "Cellular Connection List for Panasonic Products". Once registered via Bluetooth, all of the Panasonic handsets call-out and receive calls wirelessly through the base unit, as though it was a landline phone. It is however a SINGLE line phone - i.e. in or out from any one of its three ports: a) cellphone #1 or, b) cellphone #2 or, c) landline, but ONE call at a time. The phone's 1.9GHz frequency will not interfere with the 2.4GHz frequency typical of routers, home security systems, and other computer wireless devices. As for performance - very impressive! The handsets are a bit larger than our replaced 12-year old Panasonic phone system, but better designed with a very readable black on bright-white display and larger buttons to reduce dialing mistakes. The newer technology NiMH (nickel-metal hydride) batteries no longer have the old-style proprietary shape, instead they are conventional AAA size, and so could be easily replaced if they ever wear out. The sound quality is excellent, virtually noise free - incoming calls via the cellphones are perfectly clear. The Intercom feature - while nothing new - is still a great help in a multi-story house or office and also delivers excellent sound. The handsets can be "named" (up to 10 characters) allowing room names to appear on the intercom menus. Each handset has a volume amplification control - a useful feature in a noisy room. To review the features and capabilities of this phone, use the following search string to download the Panasonic user manual in .pdf: "KX-TG7745S Owner's Manual (Multi Language)" -----7 mo update----- 13 November 2012: No complaints, rock-solid performance and excellent audio quality over dozens of incoming and outgoing calls on two cell phones (LG and Motorola). The intercom has been a handy feature in a multi-level home. The Panasonic has allowed me to jettison a $41/mo landline bill. Highly recommended and still worth 5-stars! -----19 mo later, Nov 2013----- Just upgraded mobile phones to Motorola Moto Xs. Both connected to the Panasonic Bluetooth with out issue. The Moto X Bluetooth radio seems stronger: conversations through the Pasnasonic can be had at even greater range (distance between mobile phone & Panasonic) with very high voice quality. There is an issue with OUTGOING calls with the Moto X. See comments of 1 Dec 2013. (Moto X - NICE phone BTW)