Insightful articles on cell phone carriers, testing, inception, development, etc.

I've worked on mobile devices in the past but only from the software side and never been on the side of carriers. I was always very far removed from anything that had to do w/carriers.

Anyway, I found these articles quite interesting and insightful:
Engadget: How an AT&T smartphone comes to life: behind the scenes (part one)
Engadget: How an AT&T smartphone comes to life: behind the scenes (part two)

These are older but were also interesting:
Cnet: A tour of Sprint's Kansas headquarters (photos)
Cnet: Inside Sprint's cell phone testing labs (photos)

Discuss or post other interesting articles along these lines...