We're sincerely sorry for the issue. Would you please give us more info about your issue via Dingtone-More-Help & About Us-Feedback? Our support team will get back to you as soon as possible. Here we will also keep improving and providing you with better experience.
Thank you for using Dingtone. Please submit the issue from "More"->"Help & About Us"->"Feedback or Report an Issue", and also tick off the "Send diagnostic information to Dingtone" from the App, that will help us solve the problem.