I see your dumb phone, raise you a Zello radio : r/dumbphones
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Amazon.com: Walkie Talkie Phones Zello PTT Button APP WiFi Mobile Radio 3G/4G Network 100 Miles Long Range Smartphone GPS Android KSUN ZL60 : Electronics
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Waterproof Zello Radio:POC Radio with NFC and SOS Button
Waterproof Zello Radio:POC Radio with NFC and SOS Button
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ZELLO Network Radio | Panda Communications
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How to Make Zello Crosslink in 4 Easy Steps! - YouTube
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OPERATING ANY RADIO OR REPEATER USING ZELLO AND FIXING THAT UV5R TRANSMIT PROBLEM - YouTube
