samsung s4 red x by signal

hi all, I have a sprint samsung s4, I was messing around and reading stuff online about trying to get it unlocked for other carriers. i think i have come to the conclusion that it cannot be unlocked domestically via sprint but via other means. i changed some settings and now the signal bar shows an X, i am trying to figure out how to restore it to default settings because I may go the ringplus route with this phone now instead.
i think it may be related to settings in the service menu - *#0011#

if anyone knows the default network settings in there, it may help me to restore it.

any help and suggestions is appreciated