MONTREAL–(BUSINESS WIRE)–Siyata PTT, a leading provider of mission-critical Push-to-Talk over Cellular (PoC) handsets and accessories, today announced the launch of its new SD7 Ultra 5G Push-to-Talk handset with Verizon, expanding the companies’ longstanding relationship in mission-critical communications. The rugged, radio-style design provides frontline users with a dedicated Push-to-Talk experience, allowing them to communicate with their teams quickly without relying on a traditional smar