When my customer shops my online store via mobile phone shipping is not an option, via desktop it is...
Hi KyleSmart2014,
That sounds a bit odd but, stranger things have happened. Your Square online site is designed to be responsive - other than how it's displayed on the device, nothing should change. Perhaps sharing your site's URL would be helpful for others to take a look. Please understand that the Community is not the same as Tech or Customer Support but, there is quite a bit of hands on experience here.
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