The easiest way to get higher speeds is to upgrade to a faster plan with the same company. A second option is to switch to another ISP with a better deal or higher speeds.
The problem is many people don’t have the second option. ISPs have gotten together and agreed to stay out of each other’s areas of service. These agreements mean there’s little to no competition, and it’s part of why internet speeds in the US are five times as expensive as top-rated South Korea.
If only Google Fiber would roll out to more cities. Their $70/month service gives you 1,000 Mbps for downloads and uploads!