[Sephiroth]

To amplify Kwikkie's excellent advice: Speedtest.net is now becoming somewhat unrliable. I now use speedtest.bbmax.co.uk which at least doesn't stutter.

But simultaneous downloads is the real test. Subject to seeing your modem stats, at first sight it seems possible that what coud support 10 meg in traffic terms can't support 30 meg. And, of course, VM won't return you to the legacy network if you downgrade, but you are more likely in a congested area to get 10 meg than 30 meg.

The SH in modem mode won't slow you down.