Here's how you can pair a Wear OS smartwatch with a new phone without resetting it, thus retaining all the apps and data onboard the watch.
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EURANS Smart Watch 41mm, Full Touchscreen Smartwatch, Fitness Tracker with Heart Rate Monitor & SpO2, IP68 Waterproof Pedometer Watch for Women Men Compatible with iOS & Android Phones : Electronics
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How to Pair Wear OS Smartwatch With a New Phone Without Factory Reset - Guiding Tech
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Ticwatch Pro 5 Smartwatch for Men Snapdragon W5+ Gen 1 Wear OS Smart Watch 80 Hrs Long Battery Life Health Fitness Tracking 5ATM Water Resistance GPS Compass Android Only Compatible, Obsidian : Electronics