**Plug and Play, No Configuration** With an integrated 4G LTE modem and a built-in SIM card slot, all you need to do is insert a micro SIM card and turn on the router. Enjoying fast, stable WiFi on a 4G LTE network has never been easier. **Enjoy WiFi and Phone Calls Simultaneously** TL-MR6500v is not only a WiFi router and modem combo, but also a phone. It has a phone port to connect your existing landline phone so that you can make phone calls and surf the internet at the same time. Moreover, various voice functions are supported including VoIP, VoLTE, and CSFB. Simply enjoy a professional and high-quality voice call as you like. **Special Design for Maximum Network Coverage** Two detachable advanced antennas reinforce the wireless connection between the router and every device with more stability and flexibility. A built-in power amplifier and low noise amplifier also help provide wider coverage by improving the router’s sending and receiving capabilities.