Lg cdma/lte only
 

I need to convert my lg g stylo ls770 from CDMA to GSM Need help please

I would also like to be aware of this procedure if it does exist

It doesn't work with gsm, only with cdma/lte sim card!
The hardware for gsm is simply not built into this phone, so don't waste your time.
Also, on firmware version ZVE and newer you cannot edit the apn, it's locked down completely no matter what tricks you try.

It doesn't work with gsm

only cdma