Hello,
Requirements:
Phone must be rooted
Need a gsm software: Z3x, Chimera, Octopus or GCKey
Make a phone backup of efs and certificate
Steps:
Connect your phone to usb (make sure oem unlock and usb debuggin is on)
Make DM+MODEM+ADB connection allowed by calling *#0808#
Read your phone certificate using a gsm box
Open your phone certificate and duplicate everything seen after IMEI line by copying and adding 2.(example IMEI2, Pubsignkey2 etc)..Write back your new phone certificate
Your phone is now dual sim
Mentions:
This won't change your IMEI so it won't trigger law in countries where IMEI changing is illegal.
In case you don't have gsm box or you need help you can contact me. I tested and done it on multiple exynos versions(g930f, g930w
and it worked.
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