How to change Device Name on Galaxy S4. If you change the device name, the Bluetooth name, WiFi direct name and the name on the entire apps and settings is changed automatically.
To change the Device Name on Galaxy S4 follow the instruction:
1. Open "Settings" app and move to "More" tab
2. Tap "About Device"
3. Find "Device name" and select it
4. Write the new name and hit OK
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