The images come courtesy of none other than Evan Blass, and they show the alleged Galaxy S10E, Galaxy S10 and Galaxy S10 Plus. All three phones appear to be enclosed in a hard, clear plastic case and there is no sign of a rear-mounted fingerprint reader on any of the devices. That leads us to [reasonably] infer that Samsung will be using an in-display fingerprint reader for the entire family.
Samsung Galaxy S10E, S10, and S10+ (L to R), encased pic.twitter.com/Pk2gpXkXxn— Evan Blass (@evleaks) January 19, 2019
Also visible are dual rear cameras on the Galaxy S10E, while the Galaxy S10 and Galaxy S10 Plus both appear to include triple rear cameras. If you switch your attention to the front of the phones, you can see that the Galaxy S10E and the Galaxy S10 appear to have Infinity-O "punch hole" cutouts in their display for the selfie camera like the Galaxy A8s. The larger Galaxy S10 Plus features double cutouts to accommodate its dual selfie cameras.
At this point, it is widely expected that every member of the Galaxy S10 family will come with an OLED display panel and Qualcomm's newest 7nm Snapdragon 855 SoC with at least 6GB of RAM on the higher SKUs. It's also reported that there will be a range-topping, Verizon-exclusive Galaxy S10 model with a massive 6.7-inch display and 5G connectivity.
Samsung's big reveal is just a month away at this point, and we're bound to see more leaks filter down leading up to the event.