The ways to buy high-speed rail tickets by mobile phone are as follows: tools/raw materials: Xiaomi 12, MIUI 13, Railway 12306 1.6. 1. Open the railway 12306 software, select the place of origin, and then click the query ticket. 2. Then click on the train number here. 3. Enter the train interface and click Add Passenger. 4. Then choose the passengers who want to take the high-speed train. 5. Choose your seat, click here to submit your order and pay the high-speed rail ticket.