The Mobile Rapid Response Unit was started in 2012 to fill a need for cell phone repairs in the Western Massachusetts market. Throughout 3 years in the mobile industry, Desmond Duval (founder), saw many customers stuck without insurance, out of warranty, with a cracked screen and another 6 months to their next upgrade. Sending these customers away was always a disappointing affair for everyone involved.
When the opportunity presented itself, MRRU began doing business, intent on helping out those customers whom the mobile carriers can't, or won't. Additionally, we're hoping to help our customers to find the right phones and plans for their needs, harnessing our experience to ensure the best deals for your company, without waste. Once those phones are set up, training is a must, and we provide on-site training for our business and home customers.
--from About Us, www.mrru.us
It may have been mentioned in step 20 at some point, but it isn't anymore. The phillips head screw that's mentioned in step 20 is the one holding the grounding finger to the rear-facing camera corner of the motherboard.
That said, my concerns about step 16 have since been rectified, so I suppose step 20 could've been fixed at the same time.
Between steps 7 and 8, there are a number of steps missing, including the removal of the camera, and the removal of the speaker assembly.
These can be found on the "Mother Board" repair manual, back on the device page.
~Desmond
This has been changed several times on the iphone 4 logic board manual, and the changes are always being reverted. There _IS_ a screw in step 16, but someone seems intent on not having it mentioned in the manual. Dunno why...