I just did this on my G5 this arvo if you follow the instructions exactly and move the gold contacts under a microscope it fixes the problem. Before I could never get a gps lock and navigation would rely on mobile towers. With this I now can get 7-10 gps locks in under 30'seconds. Also use a cotton bud and some isopropyl alcohol to clean the contacts on the other side of the case when you have it apart. Hope this helps! https://www.reddit.com/r/lgg5/comments/4u8m9p/how_to_fix_your_gps_fixed_in_10_minutes/