套路1：限速，根据网络拥堵情况，降低tc里无限流的优先级，其中plan1是全部流量全是低优先级，plan2和3是超过22G和75G降低流量优先级。
套路2：热点分享限速，600Kbps/15G/20G
其他套路：
3.Domestic data roaming at 2G speeds; //美国怎么突然有了国内漫游限制，这一条不解
4.Int’l data reduced to 2G speeds after 512 MB/day.
5.If more than 50% of your talk, text or data usage in a 60-day period is in Canada or Mexico, use of those services in those countries may be removed or limited.
6.Video Streaming is HD on smartphones (SD on Go Unlimited).
第六点很好奇，运营商怎么限制视频分辨率的啊。