Registration keeps failing

Question

I have purchased a landline number through sipgate.co.uk which I would like to forward to my iphone 7 through the zoiper app. Registration is successful but it's not long before this changes to registration failed and then if anyone tries to call me they get a message saying they have dialled an incorrect number. If I turn my phone off and back on again registration is successful but this doesn't last long. Does anyone know how to fix this issue?

Answer 1

When you're entering your extension: i.e....  1850@https://yourdomain.com

That is your account name

in the Host portion of the authentication...take out the 1850@https://    

Just put in yourdomain.com as the host. This should all your account to register.