Mobile is good, I am a Redmi note5 pro user. I needed the bigger battery thats why I choose Samsung M30s. Let me include some pros and cons so you can make a choice before buying it.
Pros:
Super AMOLED Display(thats amazing from Samsung).
front and back cameras are also very good.
Lightweight(for the 6000 mah battery).
Cons:
The fingerprint scanner is worse.means worst. If you swipe your finger it will not recognize you. It takes one second to unlock your phone.
battery is not performing like 6000 mAh its the same as 4000 mAh like other phones.
Face unlock is also worse. It did not recognize properly, even if I close my eyes it will still recognize me thats the security threat to the user.
Network band is also worse, gives around 50% network compare to my last phone.
And the last Samsung inherited the hanging problem from the ages. The main problem is network issue SAR value is too low.