This depends on your level of usage. Before you download it, we recommend that you contact your mobile service provider to find out more about the data plans it offers. Our users have reported data usage between 100Mb - 300Mb per month, so a basic data plan that offers a monthly usage of 500Mb should suffice for most users. An unlimited data plan is strongly recommended for Heavy App usage.
Please Note: BTSidekick will not work with WiFi (wireless network) connection alone. You must have a data plan with your mobile service provider in order to use BTSidekick on your mobile device.