How to apply for 3 yuan file of 4G traffic upgrade package by SMS?

The 4G upgrade traffic package has five grades: 1 yuan/month package 1MB, and 3 yuan/month package 5MB. The traffic in this traffic packet can be used for 4G, 3G and 2G Internet access, only in Chinese mainland, excluding WiFi Internet access. This is mutually exclusive with 3G traffic package, 4G traffic quarterly package, 4G traffic semi-annual package and 4G traffic annual package. Each number is limited to one file and cannot be accepted repeatedly. Users who enjoy 4G package, 4G building block package and flying Young pure traffic 4G cloud card cannot apply. You can open the 4G upgrade traffic package through customer service, business hall, network hall, palm hall and short hall (edit the short message KTSJB3 to 1 1), and the package will take effect immediately. In the month of subscription, the function fee is charged by the day, and the fee is rounded to the nearest minute. The traffic in the optional package will be converted by day and rounded to MB. Edit the short message QXSJB to 1 1 to cancel the 4G upgrade traffic package, and the cancellation in the current month will take effect next month; Changes to the package file take effect in the current month. Click on "official website" Customer Service 2 17 below for more service offers.