Understanding Mobile Number One‑Click Login and Verification Across Chinese Carriers

Many apps now support “one‑click login with the device’s phone number”, a service built on carrier‑provided gateway authentication that allows users to register or log in by authorizing their SIM card, offering a smoother experience than SMS codes.

China Mobile’s service supports three‑network numbers and offers one‑click login and number verification via SDK/JSSDK for iOS, Android, H5 and mini‑programs. It uses network‑gateway number retrieval, requires data network, has an 8000 ms timeout, and caches credentials to improve success rates.

China Telecom’s Tianyi Open Platform provides password‑free login, phone number authentication, and secondary‑card verification for China Telecom users, using gateway pre‑login and SIM identification to securely obtain the device number.

China Unicom’s Communication Innovation Platform offers number authentication, anonymous device and user identifiers, empty‑number detection, secondary‑number verification, and three‑element verification. It supports iOS and Android, and its SDK works across APP, H5 and mini‑program scenarios, enhancing security and marketing efficiency.

All three carriers rely on the operator’s network gateway to retrieve the device’s phone number, perform verification, and provide additional services such as risk identification and user profiling.