ZT-600 plus GSM wireless telephone is excellent for home or business use. Users can connect to voice conversations utilizing the mobile phone network instead of a landline with this low-cost cordless phone. You can make and receive calls and messages after entering a 2G SIM card and charging the battery. It's a cordless phone with a 2.4-inch LCD screen that's simple to see and has a backlight. It also has an antenna, thus no extra antenna is required.