Xiaomi
Reset Wi-Fi, Mobile Data & Bluetooth auf Xiaomi
Wi-Fi networks that stop connecting automatically, mobile data that fails after a SIM change, or Bluetooth devices that refuse to pair again usually point to corrupted connection profiles rather than a hardware fault.
MIUI stores every Wi-Fi password, paired Bluetooth device, and mobile network configuration in a dedicated connectivity database. Once an entry in that database gets corrupted, turning the affected connection off and on only masks the symptom for a short time.
What the reset changes
Resetting network settings clears all three connection types at once: saved Wi-Fi networks and passwords, mobile data and APN settings, and every paired Bluetooth device. All other settings, apps, and personal files stay untouched.
To run the reset, go to Tap on Settings ➔ Tap on Connection & sharing ➔ Tap on Reset Wi-Fi, mobile networks, and Bluetooth ➔ Tap on Reset settings.
Use this reset when a specific connection type misbehaves across multiple networks or devices, not for a single failed Wi-Fi login. If only one network or one Bluetooth accessory causes trouble, forgetting that single entry first is the better fix.
Side effects to expect
After the reset, you need to enter every Wi-Fi password again and re-pair all Bluetooth accessories, including headphones, watches, and car systems. Mobile data returns to carrier defaults, which can require re-entering a custom APN if your carrier needs one.