I talked long and hard with my ISP when they discontinued my "phone" connection and pushed me faster (jump from 8Mb/s to 100Mb/s) connection via TV cable and only way they can deliver me connection where I can expose ports to the Internet is 3G connection (which works around 3-5Mb/s where I live on a good day)

I'm not ISP locked, but no other ISP offers me anything else since: "we don't offer worse service since we can offer you faster connection via TV cable".