Please don't forget that even if your phone is compromised you still can soften the damage with "further walls". Use signal, with locked access to chats e.g. - since it's not cracked by cellebrite as far I know
Encrypt your important noted and so on
23Sha-ger As an Israeli who worked on NDA with Cellebrite in the past, I doubt a random border patrol will investigate your device with UFED. This requires special training and license, and it's usually not provided to such entities.
I wouldn't bet on it - they might don't -directly- remove it from you and try to do the cellebrite magic... but they may ask to unlock and look trough your data. That's not that unlikely with US border controls e.g. - and depending how they feel they might start further processes with you.
and if @cellebriteandco travels into CN e.g. they should definitely prefer a burner, just look at Xingjang, where you need to install a spy-app (https://github.com/motherboardgithub/bxaq // https://www.vice.com/en/article/at-chinese-border-tourists-forced-to-install-a-text-stealing-piece-of-malware/ ) it may not be cellebrite* but yeah... and I believe there is also an app for Hong Kong border crossings.
Actually it is the reason I don't travel to China - or the US - since some years.
(*how knows where they got (parts) of the code)