[AC Question]

Best App for 4G to 3G changer in order to control my Data usage for Samsung s7?

[chanchan05]

Using 4G or 3G does not change amount of data used. Watching a video using 3G will use the samw data as watching that on 4G, the only difference is time it takes to load.

[psionandy]

Well... it will reduce the amount of data, if it streams at a lower bit-rate....

and if you have a capped account, it will take longer to burn through it if a chunk of the day is spent staring at the screen.....

[ManiacJoe]

That seems like a big "if".
The bit rate should be controllable by the app doing the download.
The bit rate should not be related to the 4G vs 3G rating of the connection.