Due to recent changes in iOS13, the way VOIP calls are made in iOS devices has changed in the latest version of iOS13 and as a result you might face problem in making calls using Subline app.

We would like to inform our users that we are working on to make the necessary changes to make the app iOS13 compatible. If you face any problem in making the calls, please do not hesitate to reach to us.

We request our valued customer to please cooperate with us.