Nextel -

Data capabilities were described as slower than 1990s dial-up internet.

Used the iDEN network , which was excellent for voice and PTT but struggled significantly with data speeds, becoming obsolete as the smartphone era began. Historical Reviews (Sprint-Nextel Era) nextel

Nextel as a carrier no longer exists for general consumers, but its legacy lives on: When Phones Were Fun: NEXTEL Data capabilities were described as slower than 1990s

By the late 2000s, reviews became increasingly negative as the merger with Sprint caused service integration issues: nextel

Following the Sprint merger , customers reported a sharp decline in support quality and helpfulness.

Its most iconic feature was the signature beep sound (or "chirp") that preceded instant communication at the push of a button.