SMS Signature
I. SMS Signature Management

On the domestic SMS page/SMS Signature Tab of the USMS service, signatures applied under the current project are displayed by default, including key information such as:
- SMS Signature ID: The system-generated signature number. If you have questions or need support related to the SMS signature, you can provide this number to expedite the process;
- Signature Type: Classified as company, app, website, mini program, trademark, government/institution/other organizations, based on the purpose and submitted materials;
- Signature Content: Applied autonomously according to your purpose and submitted materials but must meet relevant standards (see: Signature Review Standards);
- Creation Time: Time of application submission for your SMS signature;
- Review Status: Progress is updated in real-time according to the review, including statuses such as pending, in review, approved, and not approved;
You can manage and maintain the applied signatures. The ones in pending, in review, or not approved statuses can be re-edited. The modified signature will be resubmitted for review. For signatures not approved, the system will provide specific feedback.
II. Self-service Application for SMS Signature
2.1) Submit Relevant Application Materials

On the domestic SMS/SMS Signature Tab page of the USMS service, click the “Create SMS Signature” button at the top left of the list to navigate to the “SMS Signature Application Page,” where relevant materials can be submitted as needed. The explanation is as follows:
- Signature Type: Select the type based on the intended use of the SMS signature and materials to be submitted for review;
- Signature Content: Fill in according to the intended use and materials to be submitted. Review standards can be found here: Signature Review Standards;
- Review Materials: Submit relevant materials based on your SMS signature’s intended use. Review standards are available at: Signature Review Standards;
- Signature Purpose: Divided into personal use and external use, with “personal use” as default; if the signature is for external use, an authorization letter is required, see: Signature Review Standards;
2.2) Signature Review Progress and Results

- Review Time: 09:00 - 18:00, extended on public holidays. It’s recommended to submit applications before 17:00;
- Review Progress: SMS signatures are typically reviewed within 1 business day after submission, with feedback provided;
- Urgent Applications: If you urgently need to use an SMS signature for which you’ve applied, you can submit a ticket or contact technical support directly for expedited review;
- Review Results: You can only use the SMS signature normally after the review status is “approved”.