[Samsung Galaxy Nexus] ellesshoo:
This has been reposted to it's own topic with more details and more pictures. Link: http://xdaforums.com/showthread.php?p=22458078#post22458078

Unfortunately this endeavour doesn't yet answer some of the big questions, such as whether or not an LTE model will fit a Samsung manufactured car dock for the GSM model. I don't really have a step-by-step tutorial to follow because.. well it's pretty obvious what the goal is. So here's the basics of how I modded a Verizon Galaxy Nexus car dock to provide power to my GSM model by way of the pogo pin contacts:

DISCLAIMER: Bad photography ahead.

Step 1: Grab a good beer, somehow these things always take longer than you expect.

Step 2: Take a lot of measurements. You end up drilling the dock blindly so your results all start in how carefully you measure things. Don't use the numbers on my caliper for your own use... At the time of these pictures I accidently zeroed the caliper so I don't know which ones are showing correct values or not. I only realized this because I measured everything again and realized something wasn't right with the numbers.

Step 3: Double check your measurements, make sure everything is square... I want to say the following picture is over board on my part... but it really is a fine line between making contact b/w the pins and the phone 100% of the time, 50% of the time, or hardly ever.

Step 4: Use masking/electrical/whatever tape to protect the areas you plan on measuring because caliper arms and vise heads are not friendly. I used masking tape which turned out to be very helpful because I could see the contact points through the tape. I used a pencil to trace a line from the contacts up the side of the phone, and onto the front glass. I then place the phone in the dock and put a new piece of tape from the edge of the phone around the edge of the dock and traced the line back over the dock so that I had a good reference for where to drill in the side-to-side dimension. The vertical dimension was purely based off my measurement from the face of the phone down to the contact points.

Step 5: At this point I used a 1/16" drill bit to make two holes and then pushed the pogo pins through. Before proceeding I hooked up 5V power using aligator clips to the pins and put the phone in the dock just to make sure everything was in the right place before I really made anything permanent. In this picture the pins are only held in place by friction. The dock is very rubbery at this location which is nice for holding the pins in place.

Step 6: I then took a car charger and cut the micro USB end off. There really isn't much to picture here. I happened to use a car charger with a permanently attached cord so there were no data wires. If you use a USB cord that contains 4 wires, usually red, green, white/yellow, and black, just tape off the green and white (date + & data -), and use the red (+ 5V DC) and black (ground). The pogo pin closest to the power button is the ground and the pin closest to the bottom is for 5V. Middle pin, assuming the same paradigm used for the nexus one, is for signaling the type of dock and the bluetooth id of the dock.

Step 7: I soldered the 5V and GND to the pins as described, sealed some exposed conductor with heat shrink, and used an epoxy to permanently seal them in place.

So, did it work...

After waiting enough time for the epoxy to set I got what I had hoped for.

Here's a few extra pics:

I have some minor cosmetic/tidying up I want to do but it's fully functional and feels very durable. There were some lessons learned and some things I wish I had done differently that can only happen after you've gone through with it. When I get a chance tomorrow I'll try to elaborate on that.

Your move, Samsung.