Multiple 3cx android app 'Only Secure' doesn't work

[Arunesh Dutta]

I have set up certificate for secure encrypted calls.My aim is secure encrypted calls between bunch of extensions.The 3cx android if set to only secure in one end and allow secure in other it works fine but if I set allow secure in both the android clients call fails,as I wanted a bunch of extensions to only have secure communication.Kindly guide how to fix