Have you ever seen such quality in the GPS signals and the fixes? (picture 1)
Ever since I got my TFP in early January I have been trying to find a way to enhance the GPS and the Wifi. I read just about all the threads on these subjects and tried every tweak. Even the crazy ones ;) But because of the form factor I wasn't going to drill holes and put antennas on the back (respect guys, awesome work)
It started with a poster that got flamed straight away. He put a phone on the top right hand corner and got a better GPS. I felt sorry for him because everyone treated him like a retard. Just for the sake of being able to put the flamers in their spot I gave his idea a chance.
And it worked!!! But it was not practical. I can't walk around with a phone pressed against my TFP. But it was a start. Something started happening.
Next came the screwdriver trick. Even better result. Then I discovered the paperclip trick. Again improvement. But still not good enough and certainly not stable. It was difficult to reproduce. It became clear to me that positioning was very critical.
On the Wifi side people started enhancing their signal by placing foil the right Wifi antenna. Then they started using beer cans. It worked for some. But for others it didn't work. Theory was that somehow the Wifi signal got shielded forcing the other Wifi antenna to kick in. Tried it. Worked sometimes and at other moments didn't work. But there was something. And again it became clear to me that positioning was very critical.
Furthermore I started fooling around with grounding to the back plate. It had a dramatic effect on Wifi and GPS. As soon as something touches the back plate the signals die. I got the impression that the Wifi and GPS antenna were to close to each other and with all the RF signals they were screwing each other.
But all together there were things happening. I started documenting exact positions and sizes of the tweaks I was applying. Wifi was reasonable for me as long as I had a good base signal. GPS had my attention. I could get an external GPS, I could tether from my phone, I could buy a map, I could ask directions.
I wanted the GPS inside the Prime to get a reasonable fix.
It has cost me a lot of hours of trying, tweaking, adapting, and documenting.
I FOUND THE 10 CENTS SOLUTION!!!
You only need to buy a 1 mm stainless steel cable.
Instructions (also see diagram):
1. First get yourself a beer. And drink it (this is the best part)
2. Then cut yourself a square 15x25 mm from the can (carefull)
3. Stick it in the right place onto the glass
4. Make sure it is isolated with electical tape on the topside
5. Place steel cable across the isolated square (I don’t know if this matters but I used 9,75 mm length = 0,5 x wavelength of GPS)
6. Fix it in place with electrical tape
ENJOY A GOOD GPS (better than my HTC Sensation)
Up to now this is the best result I can get.
Probably sizes and locations can be optimized.
However my experience is that the cable has to extend outside the plane of the TFP. Either vertical or horizontal. As long as it is inside the confines and flat on the glass of the TFP the signal dies instantly
And the electrical tape on top can be exchanged for something better looking.
Customize it like a sticker of a mouse with the tail being the steel cable.
Or a droid sticker with antenna ears upwards.
Outside and in the car I get a 4 second lock and after 10 seconds 15 sats and 10 locked. Inside has improved but not really good enough.
I have reset the prime before testing, cleared AGPS and Wifi off.
I hope you guys enjoy and appreciate my solution.
And if someone finds a better or more elegant solution please post.
Oh I forgot to mention. The trick also works with the paperclip. Use a small paperclip. When straightened the length is 95 mm. Also works. I turned to the steel cable because I wanted something flexible.