I saw an old question by chance [link] which was (in my opinion partially) right at the time, but since then there are more facts. Is it accepted to post 1. more information on the original statement correcting it 2. post updated information which might only apply to newer questions of the same type
As an example in the question I referenced, I feel there is missing a clear indication that the server side does not know where to call home. The cell-phone requests this information (and thus registers with the server on where to send subsequent requests). I'd also like add that nowadays phones like the S5+S6 (to my knowledge) have something like stable internet connection detection (it is freely translated "intelligent network switch"), where they switch between those two networks if required/determined according to outside conditions, for example connection quality etc.
Is it accepted to answer old questions if any substantially different information is added.
Is it accepted to answer old questions if new information / new tech facts come out.
Sorry if this is a question for meta-meta or something like that. I'm still a bit new, but happy to be here.