I live in Germany. I'm planning to stay in Lviv for a week in late April and early May for a work project. I'll be flying into Košice, Slovakia, then taking two trains to get to Lviv.
I'm somewhat okay with the idea of just buying a prepaid phone once I get to Lviv's main train station, but if there's a way to reduce uncertainty by getting a prepaid phone ahead of time, I'd prefer to do that.
Are there any reputable through which I can get a Ukrainian-friendly phone and SIM card ahead of time?
Please suggest only major vendors for which Wikipedia pages exist. My goal is to get a prepaid phone without having my credit card info stolen :-D