@korina Im using Iphone 11 and also tested with LTE and WiFI connection, both working very well (as internet connection ofc, not ICON on app). It seems like the problem maybe ICON itself, but who knows really. Also thinking about regional restrictions, @przemo1986 have same problem and we both from same country, idk just trying to figure it out. BUT works fine on desktop though.
Also, as mentioned, last ICON update is "1 day ago" on my mobile and 11h ago on desktop.