The update I received yesterday (4/12/19) on my unlocked S10+ appears to have fixed this issue!
I concur! The March update fixes the Caller ID and Spm Protection from turning off after rebooting the phone!
Today, I cleared the cache and data, disabled, enabled the blocked number list, cleared out all of my blocked numbers and recent call list. Restarted my phone. Upon restart, I receved a notification of a blocked call from two weeks ago and the switch for ID/Sm protection turned itself off. I did the same sequence of events multiple times with the exact same result. The same notification of the same blocked number shows up and the switch is turned off every single time. I can not find that blocked number anywhere on my phone
Wanted to gather additional information.
Can you please send us a private message with the below information?
Phone service provider
I am having the same issue on my s10+. Tried clearing app caches and restarting but no luck. Turns off itself randomly.
Phone: S10+ (USA Unlocked)
Model code: SM-G975U1
Baseband ver: G975U1UEU1ASBA
Android: 9 (Feb Security Patch)
One UI: 1.1
Service Provider: T-mobile.