Privacy policy
Last updated: June 3, 2026
Welcome to SinuTone ("the App" or "we"). We value your privacy. This policy explains how we collect, use, store, and protect your information.
1. Information we collect
- Account data: mobile number, nickname, and other registration details you provide.
- Call data: call logs (numbers, duration, time), balance and usage for billing and support.
- Device data: model, OS and app version for compatibility and security.
- Network data: IP address and network type for quality optimization and security.
2. How we use information
- Provide, maintain, and improve calling and related services;
- Billing, reconciliation, and customer support;
- Service notices (e.g. low balance, rate changes);
- Fraud prevention and system security;
- Legal and regulatory compliance.
3. Sharing and disclosure
We do not sell personal information. We may share when you consent, when required for carriers or technical partners under confidentiality, or when required by law.
4. Storage and security
Data is stored in mainland China with encryption and access controls. No internet transmission is absolutely secure.
5. Your rights
You may access, correct, or delete account data, withdraw consent, or close your account via in-app support or published contact channels.
6. Minors
The service is intended for adults. Minors should use it with guardian consent and supervision.
7. Policy updates
We may revise this policy and publish updates via the app or website. Continued use means acceptance.
Terms of service (summary)
- Use the service lawfully; no harassment, fraud, or illegal activity;
- Rates follow app and website listings; we may adjust rates for business reasons;
- We will restore service after outages when possible but liability is limited as permitted by law;
- Balance and package rules follow in-app descriptions;
- These terms are governed by the laws of the People's Republic of China.
Questions? Contact us via in-app feedback or published support channels.