Avant Money cuts rates and goes countrywide

If you sign up for avants 7 year fixed 2.15% at a LTV of 70 to 80%, what happens if you want to switch when your LTV is below 70%, can you get the lower 2.05% rate (if its still on the table). Will you have to break out and refix (will there be a break fee) or will they apply/honor the Lower LTV rate pending a new valuation.
Thanks