If there's 5G connectivity but no 5G devices on it, does it make a sound? Wait, no, that's not right
https://www.theregister.co.uk/2019/04/05/vodafone_tests_5g_in_birmingham_using_4g_phones/
Vodafone has proclaimed Birmingham New Street as the UK's first railway station to have 5G connectivity. There's just one minor problem – the lack of actual 5G devices necessary to use it.