It's not with the rom it's worth the phone he uses. A generic mediatek device you update. 

Oh it looks like he made a vid recently on how it's a so so privacy and usage issue

https://odysee.com/@RobBraxmanTech:6/Imsi-x1:5?r=8r7eBm6hEAxmRgccRJtbAufGg2SSgHdX