Frequently Asked QuestionsFAQ

SMS verification sends a verification code to users' phones via SMS for identity authentication. Widely used in registration, login, and payment confirmation scenarios to ensure user authenticity. Baichuan Cloud verification SMS uses direct carrier channels, arriving within 5 seconds.

SMS verification is for identity authentication (registration, login, etc.), emphasizing real-time delivery and arrival rate. SMS notification is for system notifications (order status, logistics reminders, promotional pushes, etc.), emphasizing information accuracy. Both use different channel strategies on Baichuan Cloud — verification codes use high-speed channels for real-time priority.

An SMS signature is the identifier in 【】 at the beginning of an SMS, used to identify the sender. Generally use company or brand names, such as 【Baichuan Cloud】. Signatures must be submitted for review in the backend before use. Multiple signatures can be applied per account.

Integration process: ① Register account and complete real-name verification → ② Apply for SMS signature (review required) → ③ Apply for SMS template (review required) → ④ Get API Key/Secret → ⑤ Call API to send. Supports HTTP/HTTPS protocol with SDKs for major languages (Java/Python/PHP/Go, etc.).

Complete API documentation is provided with detailed parameter descriptions, code examples, and common error codes. 24/7 technical support is available via online QQ, phone 400-0754-688, or WeChat official account.

SMS template review typically completes within 30 minutes. Reviews are faster during working hours (8:00-22:00); templates submitted outside working hours will be reviewed the next business day. Template content must comply with carrier regulations and not contain prohibited content.

Prepaid model, billed per message. Only successful sends are billed, failed sends are not charged. Prices vary by SMS type (verification/notification/marketing) and volume — larger volumes get better rates. View detailed pricing on the Pricing page or contact support for a quote.

New registered users receive free test credits to try SMS services. After registration, you can view the gifted test SMS count in the backend. After test credits are used up, you need to top up to continue using.

Common reasons: ① Wrong phone number or format issues; ② Poor phone signal; ③ Blocked by phone security software (check spam/interception records); ④ User has unsubscribed from SMS; ⑤ Carrier channel congestion (Baichuan Cloud's multi-channel backup mechanism effectively prevents this). Contact support for investigation if the issue persists.

System processing is millisecond-level, with messages normally arriving within 5 seconds. Per phone number and per template frequency limits exist (e.g., 1 per minute, 10 per day) to prevent spam — configurable in the backend. Bulk sending has no frequency limits, supporting millions of concurrent messages.

Baichuan Cloud international SMS covers 200+ countries and regions globally, supporting major carriers worldwide. Prices and delivery rates vary by country. View details on the International SMS page或联系Support获取详细报价。