Samsung Galaxy S3, S4, S4 mini, S5 not recognized on PC through USB

- Re-downloaded / installed the USB drivers,
- Downloaded KIES software and did a trouble shoot
- Changed the developer settings on phone, nothing works.

Here are some of the possible solutions:
1. 
Go to dial pad & type *#0808#
It displays USB settings
Select MTP+ADB option
Press OK button
Connect to USB cable to PC
It shows Connected as a media device.

2. 
 Smart Switch for PC or Mac
http://www.samsung.com/us/smart-switch/?Nt=y

3.
Use ES File Explorer to establish a connection using WIFI
(Explained in another post)

4.
Hardware fix(toothpick method)
NOTE: perform it at your own risk.
Hold your phone and look at the micro USB connector on the bottom edge
Therer is a tongue inside USB port
Take something "non metalic" (flat wooden toothpick). Gently, lift up the "tongue"
Don't do it too much or you will break the tongue,,,just a little bit, and thats all.
Connect again and see the results, it worked for me.