I work at a road construction company. Our survey engineers use high accuracy GNSS receivers with 1 cm accuracy, but for our other field workers I’m exploring the possibility to use a regular smart phone with best possible accuracy. I’m currently evaluating Xiaomi MI 9 with it’s dual frequency GNSS receiver. Although the accuracy from a highly unscientific opinion seems to be rather good, mostly within 3 meters and often down to 1 meter, on occasion I can see that the error is more than 5 meters. So I’m looking for a way to improve accuracy further. Do you know (and recommend) any Android ntrip client app which can improve accuracy by “injecting” the position to the Mock location found in Developer options?