Please follow the below steps:
1. Check whether the phone storage space is full. If so, delete some data and try again.
2. Please long press “Voice Recorder” on the phone, click “App Info>Storage & cache” to clear the cache and storage space, and try again.
3. It may be a third party program compatibility problem. It is recommended that you uninstall the recently installed third party program and try again.
4. It also may be a system failure. Please back up data and restore the factory settings. Or download the latest software from the NOTHING official website to upgrade the phone.
If the issue persists, contact the Nothing Support Team for further assistance.