Of Course with my name being DaVinci I have discovered the best fix for this phone problem for all of mankind (until apple can fix their broken machine)
Follow these simple steps:
1) Place your "photos" icon on your home screen
2) Create a new album and name it "Phone"
3) Take a "Black" picture (by covering the camera lens while taking a picture)
4) Open your "photos" icon again and then find you "black" picture in you "camera roll" file and "select" it and "Add to" your "Phone" album
5) Go back to your photo albums and open you "phone" album and select the "black" picture
6) Now press the home button, which should take you back to your home page.
You have now created the ultimate fix for this very annoying problem and now here is how you use this fix.
To use your NEW creation follow these (2) quick and simple steps once you have either answered or placed a phone call:
1) Anytime during your active call, press the home button
2) Open your "Photos" icon
if you followed all of the previous (6) steps correctly,
This should have taken you directly to your "black" picture with the white info bars at the top and bottom of the screen and you should also now see the green phone info bar at the top of screen.
If you would like the screen to be totally "black" during your call, simply touch the center of the "black" picture once it is opened and the white and green bars will disappear also.
At anytime during your call, while the screen is totally black, you can simply press the home button to re-energize the screen.
You can now enjoy you conversations without having to worry about accidentally touching any of the phone features.
For those of you that are now beginning to think like a DaVinci you can enhance this feature even further by using your imagination and creativity as to other pictures you can use if a totally "black" screen is too boring.
Enjoy and please share this fix with everyone you can,
Michael DaVinci (Mankind's Friend)