Default [Q]How to use CDMA 800 on Galaxy Mega 6.3 LTE i9205

I would like to know how to set up CDMA 800 on Galaxy Mega 6.3 LTE model. When i opend 'Network' in my phone , it show LTE/CDMA Auto (PRL) mode.Is it the meaning of Cdma 800 card will work on galaxy Mega 6.3.I'm using Android 4.4.4 (C rom) custom rom.My Phone model is GT i9205,not i9200.Please Give me advice.Thank you!
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