How much data can I get when I boost my plan?

If you boost your Comfort+ or First Class plan, you'll get an additional 1GB at high speed.
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This is only available after you’ve used up your First Class Plan’s high-speed data.

https://intercom.help/firstyapp/en/articles/11390114-how-much-data-can-i-get-when-i-boost-my-plan