Figured it out thanks to you ( TheCoolest )! 
The issue with GT1 Mini is the USBv3 port isn’t the blue colour-coded port for quick identification, that’s next to the Micro-SD / TF reader. It’s actually the black colour-coded port that’s actually the USB-v3 port.
There need to be a specific DTB for GT1 Mini, because the parameters used for calling needs to be reversed.