bluetooth device removed but want to restore back again device name not appeared again

Hey there xupj21ben,

It sounds like you removed a bluetooth device from your phone and now want to add it again but it does not seem to show in the bluetooth menu. I would recommend the troubleshooting in the following article to help you get that resolved:

1. Tap Settings > Bluetooth and turn Bluetooth off and then on again.
2. Make sure that your Bluetooth accessory is turned on and fully charged or connected to power.
3. Make sure that your Bluetooth accessory is in pairing mode.1
4. Restart your iOS device.
5. Restart your Bluetooth accessory by turning it off and then on again1.
6. Update your device to the latest version of software. See how to update your iPhone, iPad, or iPod touch.
7. If your Bluetooth accessory has upgradable firmware, check to see that you have the latest version1, 2.

Bluetooth disconnects, intermittent connectivity, or unable to find

• Move your iOS device closer to the Bluetooth accessory.
• Position your iOS device and Bluetooth accessory in direct line of sight of each other. For example, move the Bluetooth accessory and iOS device to the same side of your body.
• Remove any case, stand, or other accessories from your iOS device and see if performance improves.
• Check for sources of potential interference and move both the iOS device and the Bluetooth accessory away from other electronic devices.
• Reset network settings by tapping Settings > General > Reset > Reset Network Settings.

  This will reset all network settings including: previously connected Wi-Fi networks and passwords, recently used Bluetooth accessories, VPN, and APN settings.

Thank you for using Apple Support Communities.

Cheers,

Sterling