If you change your plan part way through a billing month, your next bill will include the following charges:
A part month charge for the days on your old plan, plus the following month’s charge in advance for the new plan, products and services
Pro-rata credits for the days remaining on your old plan
New data allowances and inclusions will be applied immediately and you’re billing will be adjusted to include the charges above.
Price and inclusions of Business Mobile or Business Data plans are subject to change.