ASUS's tablet supports 3G Internet access, and supports 3G of China Telecom and China Unicom. The card holder used is Huawei E5805, which has two models: China Telecom and China Unicom. You can use this when you unpack it, which is almost bigger than a USB flash drive. Just put it in your bag when you use it, and turn it off when you don't use it. Huawei's E5805 has a password. The password is on the back of the machine and consists of five numbers and letters. You must open the package yourself. The price of Huawei E5805 is around 720-750. I hope my answer is helpful to you.