A Nextel walkie talkie phone is a phone that allows you to communicate with other Nextel walkie-talkie phones without using a cellular network. Nextel walkie-talkies use a two-way radio system, which means that you can talk to anyone who has a Nextel walkie-talkie phone within range of your signal. Nextel walkie talkie phones are perfect for people who need to stay in touch without using a lot of data, or for people who are in areas with weak or no cellular coverage.