How Do SIM-Capable Walkie-Talkies Differ from Conventional Two-Way Radios?
“Hello, hello, please respond!”—This familiar call, once accompanied by the crackling of static, was the most convenient instant communication method for security guards, drivers, and outdoor enthusiasts. Traditional analog walkie-talkies, long limited by power, antenna, and spectrum resources, typically had a coverage range of only 3-5 km. POC radios with SIM cards, through their built-in […]
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