[G2 Q&A, Help & Troubleshooting] chinyuk:
Hi all, just wanted to share what I have tried. I got the tool and opening the G2 wasn't that bad. However, to my disappointment the padding of the antenna to bring the contact closer together didn't seemed to help all that much. The fact I guess remain 1) the antenna is weak and 2) there may be some other software tweat that can help performance 3) I might agree that some form of GPS power usage could affect its performance.

After spending a whole day of driving, walking outside and testing against an S3 at home beside a window, I come to the these conclusion:

Sorry I didn't take any pictures but in my house right beside the window, pretty good case scenario cause I have no building across from my house at all, the S3 I got lock within 30 seconds and it quickly lock all 18/18 satellite. The LG G2, well, took much longer and could hang on to about 8~10 at best. What I also notice is the LG G2 just doesn't seemed to lock onto any of the Russian satellite much or at all at times, this is why out of the 16~18 it find, it only lock half of them.

Across the board, the SNR is roughly 6~8 lower than the S3, which would suggest why the locking is poor. In general, you would be lucky to get 4 bars yellow using AndroiTS while with the S3, I would say about half (9~10) are yellow. To be fair, when fully locked, both accuracy are about the same.

I did plenty of driving and after the fix, it does seem to keep lock better than before and doesn't lose lock while driving and even when it does, it recovers within a second or two. Accuracy is hit and miss, anywhere between 10m~40m in the car and sometimes worst. Using waze for most of my commute, it work reasonable well, however, we all know weather is a factor and today is a cloudy day so not your sunny day scenario but not heavy rain or snow so it isn't the worst condition for sure. Driving to some similar places, I did notice some slight improvement such as park outside of a house facing the house with no line of sight, it lost signal the day before but after the fix, although weak, it was able to get a lock. Looking at SNR in general, I never notice a lime-green (i.e. > 30 SNR) before but I have seen it on several odd occasion. At best, I would say this is a 10% difference but padding the antenna.

The usual weak area is when you are surrounded by taller building, it become pretty weak and about the only time I lost signal the whole day and once it is lost, it takes forever to recover. Personally, I do feel there is something wrong with the driver or something, really hoping that LG can address this problem in the next patch, but we know it won't happen till they give us 4.4. I like to get some feedback from others who are using original ROM like AOSP etc to get some feedback on GPS lock issue.

I got too lazy to take much picture but I think I pretty much described how to access the phone, it wasn't too bad with the right tool I got. I use some sticky note 3M paper and cut roughly the size and carefully lift up the contact base which is tape to the base, pretty easy to do if you have a thin plier. Stick it on.

I will give it this, throughout the whole day, I have it mostly locked and didn't lose position. On part of the wide open hwy, I even got a couple of pretty strong signal, so it is probably better, but not good enough to make the GPS reliable. I will say this, from 4 Android phone experience, I had the N1, Galaxy S Captivate, S2, S3 and this, the LG is the worst of the bunch. I think the N1 wasn't great but it was no where near this bad. Overall, this is one thing that really disappoint me.

I will come back in a week and give a more extended review of the fix to let you guys know how many signal lost I get and what not to let you know if this is a worthwhile fix for the time being. However, for now, unless you are willing to void your warranty, I wouldn't bother to open this up and give it a try, it doesn't seemed to solve the problem IMO.