Once upon a time, sparkling wine was opened with a saber, but since you shouldn't carry a saber around (and you probably don't have one at home anyway), you can use your smartphone instead! Watch a video of how to open a sparkling wine with a smartphone.
You want the theatrical open the sparkling wine? You don't have a saber, you say? It doesn't do anything, but why do we have it? smartphones?! But this time you will not launch a special mobile application, but use the smartphone itself, which will jump in instead of a saber. The opening process is otherwise exactly the same.
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First find the vertical seam of the bottle, which joins their halves. The glass is weakest where the seam meets the crown of the bottle, i.e. the thickened upper edge. Then tilt the bottle at an angle of 45 degrees and place the phone towards the bottom against the seam. Rub it on the glass a few times to get a "flu" and then pull firmly towards the neck and the crown will fly off like a button! Cheers!