If your a USB modem user like me I'm pretty sure you experienced poor reception. And I know you've done everything to improve reception some ways you'll be laughing at yourself looking back. There some ways to do it right like switching to a lined internet provider, switching to a carrier that broadcast better signal at your area, or buy an antenna. But there is a more quick and easy, ghetto solution to it without spending anything.
If you have some old battery operated toys lying around then you're in luck.