I received an unsolicited email from my ISP yesterday with a request I call.

…I’ve reviewed over your current internet access equipment, and it appears as though unfortunately the signal being received by your wireless receiver is lower than what is required for your current plan’s speed. This signal degradation could be due to a multitude of issues, and unfortunately can be difficult to troubleshoot via email.

First time an ISP has offered to help improve bandwidth. Even more interesting is I am getting download speeds in excess of advertised.