Latest Redmi 3 Rom 7.5.2.0 Fix 4g Lte Option Missing


mine is missing too, was flashing from distributor ROM 7.9 to official stable ROM 7.5.2.0
here's what i do :
1. remove sim card
2. press *#*#4636#*#*, go to "phone information 1", there should be options for preferred network type
3. insert sim card
4. go back to "phone information 1" pick your option from there ( i select "TD-SCDMA,GSM/WCDMA and LTE" )

note : haven't try change sim again, might need to redo the step again