Something you should keep in mind is that this method does not work all the time, since it depends on the availability of business class seats when you check in 24 hours before your flight.
► Then, you have to wait until you receive the email to check in. It's important that you do this as soon as you receive the notice, as this is the time when the airline is most likely to have more business-class seats available.
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It’s not a trick though is it?
Yeah but it’s hard to climb into the wheel well before take off.