It's not the mystery that Samsung is currently developing two variants of their new flagship device: Galaxy S9 and Galaxy S9 Plus. Some time ago firm had been releasing also third version of phones from Galaxy series which were named Mini, but the latest phone with name Mini was released when Samsung announced Galaxy S5. Now, after years there's chance that Samsung will release Mini version of Galaxy S9.
Some sources say that Samsung is working on compact phone, and under this name may hide Galaxy S9 Mini. If all project really exists, this device will be dedicated to users which don't want to buy big phones, because S9 Mini probably would be even smaller than current iPhones - journalists are writing about potential 4-inch display with Infinity Display technology.