I recently upgraded to the Samsung Galaxy S7. I have been trying to install a one touch phone dialed application. I have tried Speed Dial and Direct Dial/SMS. Both were purchased, downloaded and installed. Both allow me to create home screen icons for placing one touch calls. However, when I try to place a call I get the message "Application not installed." The applications show in my apps listing and according to the Google Play store, are installed. What would cause the S7 to issue the message "Application not install" when it is installed. Additional information, I do NOT have and SD card so the app is installed on the S7 internal memory. I have restarted the phone to eliminate boot issues as a possible cause. Seeking guidance.