Hi dev!

There are three problems with smartphone purchases:

    Smartphone purchases of crypto require integration with your bank account, which gives some people the willies. - Not all ot them are connected.
    Online purchases usually require a waiting period for new customers (to avoid fraud) - as soon as it's a blockchain you need to wait for the block with your transaction to be added to blockchain anyway.
    Most importantly, a lot of the world doesn't have a bank account. We want a crypto ATM to be their bank!! - ha ha, your ATM need internet connectoin, you think if they don't have banks, do they have enough internet for you ATMs?

I also like omni-asset idea, Ethereum needs a competitor and I like Tether so much