Getting a new iPhone? You can transfer your Signal account including message history. Set up your new iPhone with Apple's Quick Start but be sure to *skip* wiping your old phone until *after* you've transferred your Signal account from within the Signal app.

https://support.signal.org/hc/en-us/articles/360007059752-Backup-and-Restore-Messages

Backup and Restore Messages

Signal messages, pictures, files, and other contents are stored locally on your device. If you have your old device, select the platform to transfer messages: Android iOS Desktop Message restora...

Signal Support
@signalapp Switching between android and iOS is still not possible :(
@cent @signalapp yeep, I would make transferring iPrecioussss->Android-ish something of a priority for reasons which should be obvious...
@cent Indeed, I hope this is being worked on...🙏 @signalapp
@cent @signalapp
Not beeing able to migrate Signal is the only thing that impeds my complete switch from iOS to GrapheneOS. I want to leave the Apple cosmos, but I am locked in (and can't even blame Apple on this) ! :-(
@cent @signalapp imho, signal should make it possible to export encrypted chat messages so that we can at least read in text in the future. But idk the idea doesn’t live up to signal’s standard.