Apple has released the stable update iOS 12.3.1 for its devices. The new update includes bug fixes for iPhone and iPad.
iOS 12.3.1 Update Changelog:
- Fixes an issue that could prevent making or receiving VoLTE calls.
- Fixes issues in Messages that could cause messages from unknown senders to appear in your conversation list even though Filter Unknown Senders is enabled.
- Fixes an issue that could prevent the Report Junk link from appearing in Messages threads from unknown senders.
Do check your iOS device for the update.