How do I buy an eSIM for China before my ski trip?

You can purchase a China eSIM online from providers like EasyAlo before you travel. After choosing your data allowance and trip length, you’ll receive a QR code by email. Install the eSIM profile on your phone while you’re still at home, then activate it when you land in China by enabling data on the new eSIM line. The validity period only starts once it connects to a supported Chinese network, so setting it up in advance won’t waste any days of your plan.