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With you seeing 25Mbps, it's unlikely that any modem settings adjustments would make any difference, or at least not any type of settings or changes that a subscriber can make. That's not to say that any settings adjustments would or wouldn't help, but only that nothing a subscriber can adjust in the modem likely would.
It's likely that a rep will need to look into this for you. I'll tag a couple so that they'll be sure to see this thread and respond, which can take them up to a day or so. Liz Damian
The reps will likely need to see your speed tests, so if you haven't already it would be a good idea to create an account at testmy and start running your tests under that account. This way they can see what's going on with your speeds on a single page, which makes it a lot easier than looking at each test separately. Plus, tests run under your account will ensure that what they're looking at are your tests, as comp ID and the like on testmy can't be relied on due to HughesNet's use of shared IPs (multiple people can have the same comp ID on testmy).
Just in case, if they need you to show them what's going on with your slow page load, there's a Firefox add-on called "Load Time". I had a similiar issue with Facebook many months back and used the same type of add-on with Chrome, which was very helpful. The issue went away on it's own, but the info it gave them demonstrated in a good way what was going on.
Sorry I couldn't be of more help. :(
Edit: I should add that, if you have the ability to do so, it may be beneficial to try your web pages with a LAN cable connected device if you're presently using only WiFi. Sometimes WiFi itself can be the source of the problem, and a LAN cable connection is the strongest and least likely to have issues.