Intro to Sequence

Is Sequence a bank? Where can I find my account statements? How do I get a voided check? What is Sequence? Is my account insured by the FDIC? Who is Sequence's partner bank? Can I open a Sequence account if I'm not in the United States? How do I contact Sequence customer support? What are the bank holidays? Does Sequence have a referral program? How do I navigate Sequence? Do you support iOS and Android?