Our prepaid SIM cards are designed to meet the needs of travelers, including free incoming calls and texts when in China. Owning a Chinese local number is key to experiencing China authentically. 3-in-1 size SIM cards fit all smartphones, tablets, and personal Wi-Fi devices. This China Unicom eSIM review will uncover whether it's the right choice for your trip or if better alternatives exist. While slightly pricier than city options, the convenience of walking off your flight and immediately getting connected is worth it. All three major telecom carriers, China Mobile, China Telecom, and China Unicom, began accepting applications for eSIM phone services at their physical stores in Shanghai on Oct 14.