I don’t know if it’s still relevant but I get a usfully quick fix when I start gps-info app with individuell gps settings shown in the picture. Since I use SFOS I have been starting gps-info parallel to PureMaps because I allways had the impression that that’s the only (qick enough) way to get a fix.
Doing it that way I sometimes get a fix within 1 or 2 minutes.
Cheers, broncheolus.