A Galaxy S25+ that loses a Bluetooth keyboard, a watch or the car stereo is better equipped to cope than the base S25: its 4,900 mAh battery means Bluetooth is rarely cut back for power. When a connection fails, the accessory, the car or the pairing is the likelier culprit. Rebuild the pairing from both sides, check for an update on the accessory, and use the phone's Bluetooth cache clear before a network reset. A Galaxy Watch tied to the same Samsung account has its own connection and can be paired again in the Galaxy Wearable app.
Differential
Likely causes of “Samsung Galaxy S25+ will not pair or stay connected over Bluetooth”, and how to tell them apart
- 1
A keyboard or mouse that went to sleep
What separates it A Bluetooth keyboard stops after idle and needs a key press to wake
How to confirm Press a key and wait three seconds; if it does not return, remove it and pair again
- 2
A watch connection that lost its link
What separates it The Galaxy Watch shows a phone disconnected symbol while Bluetooth looks on
How to confirm Open the Galaxy Wearable app and reconnect; restart both the S25+ and the watch if it will not
- 3
The car holding too many old phones
What separates it The car pairs and then switches to a different saved phone
How to confirm Delete other phones in the car's list, then pair the S25+ again
- 4
A weak accessory battery
What separates it Audio breaks up and clears after charging
How to confirm Charge the accessory to full and test close to the phone
- 5
Nearby 2.4 GHz noise
What separates it Breaks occur near a router or a microwave
How to confirm Move a few meters away or switch the router to 5 GHz
Before you touch a setting
Record this first — changing settings destroys the evidence
- The type of accessory: earbuds, watch, keyboard, car stereo or speaker
- Whether it fails to connect or connects and then drops
- Whether the S25+ is the common factor across several accessories
- The One UI version and patch date under Software information
Try in this order
0 of 6 completedRemove and pair again
ReversibleSettings, Connections, Bluetooth, tap the gear, Unpair, then put the accessory in pairing mode and pair it.
Reconnect a watch properly
ReversibleOpen Galaxy Wearable, choose the watch and reconnect; restart both the phone and the watch if needed.
Clear other phones from the car
ReversibleIn the car's Bluetooth list, delete other phones that connect first, and re-pair the S25+.
Charge the accessory
ReversibleCharge to full, then test within a meter.
Clear the Bluetooth cache
ReversibleSettings, Apps, Show system apps, Bluetooth, Storage, Clear cache, then restart the phone.
Reset network settings last
Reset / data riskSettings, General management, Reset, Reset network settings. This forgets Bluetooth pairings and Wi-Fi networks.
Stop boundary
When this stops being a self-service repair
- !If several different accessories all fail after Reset network settings, book a Samsung check
- !If a single accessory fails on every phone, ask its maker
- !If only the car fails, ask the dealer for a head unit software update
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Does the Galaxy S25+ have a better Bluetooth connection than the S25?+
Both list Bluetooth 5.4. The S25+ has a bigger 4,900 mAh battery, so power saving is less likely to interfere with a connection.
Why does my Bluetooth keyboard stop on the S25+?+
Many keyboards sleep when idle and need a key press to wake. If it never returns, pair it again.
Why does my car connect to another phone?+
Cars remember several phones and may pick another one first. Delete the others in the car's list.
Do I lose my Galaxy Watch pairing after a network reset?+
The phone forgets its Bluetooth pairings, so the watch needs reconnecting in the Galaxy Wearable app.