I upgraded from the Samsung Galaxy S8+ phone and am disappointed. I can get past the smaller screen size, but the performance is slower and the battery life isn't as comforting as the older model. I regret this purchase.
The S9 made some very good improvements to it's predecessor, the S8. The sound is better, the optics identify you much quicker & the fingerprint pad has a larger surface to i.d. myself. Mind you, these are only a few of the improvements Samsung did to this popular model. The upgrade cost is minimal & the upgrades to the phone is optimal.
Decent phone for the price. Seems well built, but would definitely suggest a good quality case for it. Good camera and seems to have a good antenna in it, because the coverage seems a bit better with this phone. I recommend this phone.