4.7 and 4.8 are a bit high for proper hypo symptoms -- however meter accuracy starts to come in to play as well --
If i test at that level I would not treat -- only you can decide how you feel at that level --- and your meter will also tell you if you have treated the "hypo" in error.
If you are not use to running in the normal range then you will start to feel hypo as you enter into normal ranges
In general 4 to 6 you shouldn't feel hypo, though around 4 to 4.5 you might depending on how fast you hypo out and start to slide from there (some people will start to feel it at 4.5 and time they treat it they are reading 3).