Sprint Codes anyone? 4G stay connected issue?

[asteetva]

I remember in 2010 when I had EVO, someone posted sprint codes to change the duration of trying to connect to 4g, stay connected to 4g with low signal etc. Does anyone have that? I have my MSL and I want to try it, as my 4G connects and then disconnects if I receive a call and then does not reconnect, sometimes it connects and if I move my phone 1 cm it will disconnect and then will not reconnect. Also it will not reconnect if it goes to sleep. Is anyone else having these issues? Any help would be appriciated.