Turn Bluetooth off and on, restart both devices, make the accessory discoverable and keep it nearby, then forget and re-pair it. Check whether the accessory is still connected to a different phone before resetting network settings. Android keeps a list of paired devices on each phone, so remove old pairings if the list is long.
What this covers
- Standard Bluetooth accessories and supported Android devices
What it does not cover
- ×Fast Pair features unavailable on the accessory or Android version
Try in this order
0 of 4 completedToggle Bluetooth and check Airplane mode
ReversibleMake sure Airplane mode is off, turn Bluetooth off, wait briefly, and turn it on again.
Restart both devices
ReversibleRestart the Android phone or tablet and fully power-cycle the accessory.
Use discovery mode nearby
ReversiblePut the accessory in pairing mode and keep it close. Disconnect it from another phone if it auto-connects there.
Forget and pair again
Reset / data riskRemove the saved accessory under Connected devices, clear its own pairing memory if documented, and pair again.
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Sources behind this answer
Exact questions
Common questions about “Android will not pair with a Bluetooth device”
Why does forgetting the device help?+
It removes a stale pairing so both sides start fresh. Put the accessory in pairing mode first.
Does distance matter?+
Keep the accessory within a meter or two while pairing. Interference can block discovery.
What if it pairs but drops out?+
Update the accessory firmware, check battery level and avoid heavy 2.4 GHz interference.
Is the accessory in pairing mode?+
Put it in discoverable mode as the manual describes.
Should I forget the device first?+
Yes, remove old pairings before trying again.
Could the phone's cache need clearing?+
Clearing Bluetooth cache in the app settings can fix odd faults.
Could the accessory be low on battery or previously paired?+
A low battery or an earlier pairing to another device can block a new connection. Charge it and disconnect it from other devices first.
Does the Bluetooth version matter?+
Older accessories may not work with a newer phone's features. Check the accessory's compatibility and update its firmware if the maker provides a way.
Could Bluetooth need a restart of the phone?+
Restarting the phone and turning Bluetooth off and on again clears many stuck states. Also clear the Bluetooth app cache in system settings if your phone offers it, then pair again.