How to add vn2000 coordinates to smart mobile?

Hello everyone.
I am a smart user in Vietnam, I see that in smart mobile there are coordinates such as decimal, UTM. But in Vietnam we have the vn2000 coordinate system. So to make it convenient to use SMART in national parks and reserves in Vietnam. Can you tell me if there is a way to add the vn2000 coordinate system to SMART mobile? If possible, please show me how to do it! Thank you very much!
below is the vn2000 coordinate system:
VN-2000/TM-3 Da Nang zone [EPSG:5899]
PROJCS[“VN-2000 / TM-3 Da Nang zone”,
GEOGCS[“VN-2000”,
DATUM[“Vietnam 2000”,
SPHEROID[“WGS 84”, 6378137.0, 298.257223563, AUTHORITY[“EPSG”,“7030”]],
TOWGS84[-191.90441429, -39.30318279, -111.45032835, 0.00928836, 0.01975479, -0.00427372, 0.252906278],
AUTHORITY[“EPSG”,“6756”]], PRIMEM[“Greenwich”, 0.0, AUTHORITY[“EPSG”,“8901”]], UNIT[“degree”, 0.017453292519943295], AXIS[“Geodetic longitude”, EAST], AXIS[“Geodetic latitude”, NORTH], AUTHORITY[“EPSG”,“4756”]], PROJ ECTION[“Transverse_Mercator”, AUTHORITY[“EPSG”,“9807”]], PARAMETER[“central_meridian”, 107.45], PARAMETER[“latitude_of_origin”, 0.0], PARAMETER[“scale_factor”, 0.9999],
PARAMETER[“false_easting”, 500000.0], PARAMETER[“false_northing”, 0.0], UNIT[“m”, 1.0], AXIS[“Easting”, EAST], AXIS[“Northing”, NORTH], AUTHORITY[“EPSG”,“5899”]]

This feature will be in SMART 8. EPSG 5899 is supported.

i hope in the next version of Smart mobile is (vn2000) 5899 supported