@kunix
That isn't a conclusion that i could draw definitively but it on the surface it does seem like the flash hasn't worked or it should show better accuracy than the other 3490 if they are equivalent units. At best accuracy is the same, maybe, but .... ? The big question is the gps hw in the two 37>34 converts. 'Coz the other consideration is are they the same gps hw? Buggered if i know. It could be that the one i flashed with your rgn is like the ones that angelozip, rfb et al have which would otherwise constantly show 12-18 m accuracy. I didn't test it as a conventional 37>34 convert before i flashed your rgn [Bad me! Lack of foresight is my strong suite]. If you want, i'll reconvert it and then convert it to 34 normally to retest. Maybe then it will show up to 18m av.? Otherwise i just may have been comparing 'an apple with an orange'.