Unable to answer "What are the opening hours here?" – Caseway Mobile Accessories & Services (Mobile Phone Store) – https://osm.org/node/10273552341 via StreetComplete 62.2:

Sign still on outside of building, but front is completely boarded up. Unsure if it's undergoing renovations or simply gone now.

Attached photo(s):
https://streetcomplete.app/p/328021.jpg