How much traffic does it take to send a WeChat?

A letter is 2 bytes, 1000 letter is 2K, and 2M traffic can send one million letters. A number of 1 byte, and the traffic of 1M can send one million numbers. Therefore, if you only send text on WeChat, it will save traffic. Pictures and videos are hard to say. Some photos are hundreds of K (even the original image uploaded by WeChat is only a few hundred K after compression), and some small images are only a few K ... Generally, the largest video is 25M, and the smallest is even less than 100 K ... Anyway, the traffic of 300M is really a little small, so you can only send and receive photos and videos. If you want to have fun, you should have at least a few G's every month.