It sounds like you're dealing with an issue where the Galaxy Watch 7 pairs successfully with the Nothing Phone 2A in one direction (phone detecting the watch), but not the other way around (watch detecting the phone). This can sometimes happen due to a few common issues.
Here’s a step-by-step troubleshooting guide you can follow:
Ensure Both Devices Are Compatible:
Double-check that the Nothing Phone 2A is running an up-to-date version of Android that supports the Galaxy Watch 7. Samsung watches tend to be optimized for use with Samsung devices, but they should still work with other Android phones if they meet the minimum requirements.
Use the Galaxy Wearable App:
Ensure that you have the Galaxy Wearable app installed on the Nothing Phone. This app is essential for managing your Galaxy Watch’s settings and syncing data.
Open the Galaxy Wearable app and follow the instructions to pair your watch.
Reboot Both Devices:
Sometimes, a simple restart can fix connection issues. Reboot both the Galaxy Watch 7 and the Nothing Phone 2A and attempt the pairing process again.
Unpair and Re-pair:
If the devices are connected in some way but not functioning correctly, try unpairing them and then pairing again:
On the Galaxy Watch: Go to Settings > Connections > Bluetooth > Unpair.
On the Nothing Phone: Go to Bluetooth settings and remove the Galaxy Watch from paired devices.
Afterward, attempt to pair them again using the Galaxy Wearable app.
Check Bluetooth Settings:
Make sure Bluetooth is enabled on both the watch and the phone.
Go into the Bluetooth settings on the phone and make sure it’s visible and set to “discoverable.”
Update Both Devices:
Software updates can resolve bugs or connectivity issues. Check for updates on both the Galaxy Watch and the Nothing Phone 2A and apply any available ones.
Permissions:
Make sure all necessary permissions are granted for the Galaxy Wearable app and Bluetooth connectivity on your Nothing Phone. Sometimes, app permissions can interfere with successful pairing.
If after following all these steps the problem persists, you might want to reach out to Samsung support or Nothing Phone support for more specific troubleshooting related to the devices' compatibility.
Also, feel free to share the image you mentioned, and I can take a closer look if something in the setup process seems to be off!