I had the exact same painful problem described by many here — no GPS signal at all or gradually worsening and disappearing signal. I went through the suggested fixes in every single post (including the insane suggestion that said to cut the antenna ribbon, which killed the antenna entirely and cost me a new display) and none worked except the one suggested by Tim Small. The problem is not with the contacts. It’s with the back cover. The only fix is to buy a new back cover and replace it. Then, the GPS is restored to full performance. Don’t waste your time playing with the antenna contacts, the conducting mesh in the back cover, inserting aluminum or copper foils, or such. That’s not where the problem is. Now, the theory: LG G5 GPS antenna has two parts. They are in the top right corner of the phone viewed from the front. One part is inside the LCD display frame and it doesn’t go bad. The part that goes bad is the second part, which is inside the back cover and it’s made of intricate RF strips inside the...