after learning that the word is actually #бабушкофон I discovered this beauty called "Sky's Edge Rotary Un-Smartphone"

found here https://tehmo.com/diskovyiy-4g-telefon-postupaet-v-prodaju-6582p.html and made by Justine Haupt and released as Open Source Hardware #OSHW (they released under a modified CC license so technically gray area)

anyway heres the product page https://skysedge.com/unsmartphones where you can buy one (either as a kit or premade or download the build files)