How to force LTE/CDMA auto (PRL) or any other Preferred Network Type.

Hi all,

I am using miui 6.7.2 version, and I am trying to change my prefered network type to "LTE/CDMA auto (prl)" in *#*#4636#*#*, but it keeps revert back to "TD-SCDMA, GSM/WCDMA and LTE", can anyone help me?

Thanks before. :D