I'm no expert but I think you'd have get a non 0 visa outside of Thailand before you can apply for an extension based on retirement. I'm happy to be corrected if I'm wrong. I think this would make life a whole lot easier to get your bank account unfrozen too.
not good advice. It's best to get non o from your relevant County first then get extension after 90 days. Please correct me if I'm wrong. With a non o you should hopefully be able to open a bank account if you have the relevant documents.
I think you're confusing "flight mode" with "mobile data". When in flight mode your phone becomes a glorified camera. When in flight mode your phone closes all signals, incoming and outgoing. Rather than disagreeing with me, just tap your aeroplane ✈️ and see what happens 555