Taken from a post I'll link ..
Now, for the pain points. She had her Square POS app running in retail mode and Bitcoin didn’t show up on her checkout screen as an option even after she had turned it on. We had to switch her app to standard POS, which she was more happy to do but that was far from ideal since it required so much handholding on my part. I definitely wouldn’t have been able to do that at a busy coffee shop for example. Is there any reason why Bitcoin is only available in standard POS mode? @miles you guys should definitely look into a fix.
We need to have a step by step guide to assist..