The Galaxy M series is typified by being low-end midrange smartphones with modern designs and huge batteries. The Galaxy M30s is no different, with the device featuring a 6,000 mAh battery despite its relatively compact footprint. Read on to find out whether the latest entry in the Galaxy M series has more to offer than just a whopping battery, though.
https://www.notebookcheck.net/Samsung-Galaxy-M30s-Smartphone-Review-A-huge-battery-at-an-affordable-price.444754.0.html
The selfie camera doesn't seem that great from NBC's sample photo.
For smartphones you should review the notification experience too, as in, how the Always on Display works. Whether it works reliably for third party app notifications, how much battery it takes.
For such a large battery, Samsung should give more than 15W charging. I think it will take at least 3 hours to fully charge it. Or even more?
I never use AMOLED screens due to PWM (Pulse Width Modulation). IPS LCD or LTPS LCD is preferred.
Other attractive features often not in other Samsung phones: three (3) external cards, instead of just two. FM radio. Plastic back means less weight & less breakable. Flat screen means the added glass protector will not crack as easily as the curved edge screens.