Technology Mobile Communications Ad slot A336×280 / 300×250 Cell Phone Brands Phone Unlocking & Travel Privacy & Data Push-to-Talk Smartphones Ad slot A336×280 / 300×250 FAQs about Technology » Mobile Communications Is Nextel’s original walkie-talkie service still available? What is the difference between call content and call records? Are mobile phones dangerous to your health? What made Nextel important to walkie-talkie phones?