I work in the magical world of ISPs. If you’re having an internet issue, reboot your router and/or modem before calling in. It may not seem like much to you, but many background processes happen when you do so. This can be useful to troubleshoot where the issue lies. There’s a reason why techs will make you do so when calling in. And yes, they can tell on their end if and when you do so. So don’t bullshit them by saying you already did it if you didn’t.