All Boosts have minimum duration of 30 days at a time. Once added, you'll continue to receive the Boost until you opt-out or your contract ends. We'll aim to have the Boost activated within 48hrs, however, in certain cases it may take longer. If you have recently moved house or received a new phone line, the line will need to go live before the Boost can be activated. If we are unable to provision the Boost from the start of the billing period, you'll be charged the prorated amount. You must give 48hrs notice to remove a Boost prior to the end of the 30-day billing period that applies to your account. Notice received after the monthly cut-off time will be actioned at the end of your next billing period. If the Boost is removed through a customer's bill cycle the full charge will still apply & is non-refundable. You can change your Boosts via Customer Services or www.talktalk.co.uk/myaccount.