The "Use Data only" option on my iPhone doesn't work

magenta2073171

    Hi, I'm reacently travelling in China, and gonna stay here for a while. I wanna use digits to make and receive phone calls from my America, when it's on the page of validating my device, since I'm using a Chinese Sim card now, I will have to choose the "Use Date Only" option, but it's not responding when I press the button on my iPhone(tried at least 100 times now, really frustrated). Please let me know what I can do to fix it?

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