Has anyone noticed that samsung stock messaging app soo laggy.. please fix this issue. My phone is galaxy note 9.

Samsung hasn't released galaxy note 9 April security update yet? Why samsung, Does march security update is the last update we get for note 9 ? 

There is Spo2 sensor on galaxy note 9. I want to know whether it's accurate or not?

I couldn't find wifi calling option on my galaxy s9 plus. Normally it's under phone->menu setting or Under connections->mobile networks. But it's not there. Please help me. My phone model no sm-g965f.

Can we use s9 pressure sensor for check the blood pressure or not??? Please help me...