No contract; GSM/WCDMA/LTE; 3-in-1 (standard, micro and nano) size SIM card fits all phones.</br>No roaming charge, low cost as a local user! Free incoming calls and texts</br>Plug and play, no need to top-up; just insert SIM in your phone and it works!</br>ACTIVATION PROCESS: After you receive your SIM card, your MUST email: (1) passport information; (2) Amazon order ID; (3) Phone number on the SIM card holder. Detail instruction will be sent to you via Amazon messaging center once your make your order.</br>The activation process won't shorten SIM card validation period, which only starts when you actually use the SIM card! Valid for 90 days from first use!</br></br>Product Description</br></br>Traveling in China! Get a local China Unicom SIM cards, and stay connected! Users can also top-up the SIM cards via mychinaunicomdotcom. Please make sure your smartphone is unlocked, otherwise it won't work. Ask your mobile operator for "unlock" information if you are not sure. Local Tariff: 0.2CNY/Minutes, 0.1CNY/Message, 0.2CNY/MB For international calling rate on mychinaunicomdotcom. Validation period can be extended by purchasing KEEP-YOUR-NUMBER service on mychinaunicomdotcom. Per government regulation, China Unicom requires all SIM card buyers to provide their passport information to complete SIM card registration and activation process. After placing order, we will contact the buyer for the passport information. The activation process won't shorten SIM card validation period, which only starts when you actually use the SIM card! Thank you for your collaboration.</br><br/>http://www.amazon.com/gp/product/B0189LCWD4