1) What carrier is associated with the cell phone number? Telus, Bell, Rogers?
2) When you log in at
https://account.fongo.com/admin/reports/call-logs, what is the disconnect reason?
If that link doesn't direct you to the call logs, after logging in, navigate to account (upper right)-->call logs.
3) Can you reproduce the problem using Fongo Mobile while connected to cellular data (don't use Wi-Fi)?
If so, submit a ticket:
https://support.fongo.com/hc/en-us/requests/newFor the issue type (dropdown box), select "Fongo Mobile (app)-->Technical Support.
Copy and paste the call log entry from your call log into the ticket:
https://account.fongo.com/admin/reports/call-logs/, and give them the number that you're trying to call.
If that link doesn't direct you to the call logs, after logging in, navigate to account (upper right)-->call logs.
Visit
https://status.fongo.com/, and look at "Support System". Note that it can take a week (possibly longer) before someone reads your ticket.
Support staff is not obliged to read or respond on the forums, and they don't respond to tickets on weekends.