Troubleshooting V2 Click to call

Problem: The authentication token is being percent encoded when it is sending to us which causes error on our side.

Unfortunately we messed up and used characters that are not web safe. Some of the include "=" and "/". The token should be sent 

Problem: Small difference in URL between clicktocall and iclick2call

Make sure the "i" is in there.

Problem: How do I know if the call was successful?
Currently there is no callback for how to know if the call succeeded.

Problem: What numbers can be click2called?
10 digit US numbers