Network settings reset is the connectivity cure-all: it wipes every saved Wi-Fi network, pairing and APN customization back to defaults, clearing corrupt state that individual toggles can't reach.
- 1Note your Wi-Fi passwords first, all saved networks will be forgotten.
- 2Open Settings → System → Reset options (Samsung: General management → Reset).
- 3Tap 'Reset Wi-Fi, mobile & Bluetooth' (or 'Reset network settings').
- 4Confirm with your PIN and restart the phone.
- 5Reconnect to Wi-Fi, re-pair Bluetooth devices; mobile data APN returns to carrier defaults.
Tip: Your files and apps are untouched, this reset only clears connectivity configuration.