Why is the booting timing on Galaxy S10 Series different?

Based on enhanced Google Security Policy of Android 9.0 (Pie) OS, “Phone is starting…” screen may display for few seconds while device is booted if you have set lock screen with Pattern/PIN or Password.

Additionally, you may experience black screen for 1~2 second before device enters the Home screen.

Moreover, as *FBE (File Based Encryption) activated during booting has being newly applied on Galaxy S10 Series for the first time, you may feel that your Galaxy S10/S10+/S10e takes more times to complete system booting than other devices.

Samsung does our best to find optimised booting procedure and apply it to new software of Galaxy S10 Series at earliest possible.  

*FBE is one of Google security solutions.