How many times do people need to be told that their assumptions about mobile phones and security are completely wrong. Phone numbers can be reallocated (sim jacking), all communications can be intercepted (by design), smart phones are not themselves secure - especially an older/cheaper phone.
> A few minutes later, she meets a man with a cellphone and receives cash from him [..]
I imagine there being some issue with meeting random strangers.
> Agents function like an ATM: You go up to them and give them cash to get money deposited in your mobile money account, or transfer money out of your account to get cash.
This requires a lot of trust. The entire point of having banking infrastructure is to remove the need for trust. Like crypto, with no oversight, how do you know your local 'phone bank' is not a rug-pull?
In general I think that whilst on the surface this system seems great, it actually makes an incredibly vulnerable group of people even more vulnerable.
(Slightly less related, but still worth discussion.)
If you think being "unbanked" is only a problem for less-developed Countries... What if the reason you don't have a bank account is because the government froze your account due to you supporting a peaceful protest [1]? What if your government decides your social credit score is too low to allow you to have financial services [2]?
[1] https://www.cbc.ca/news/politics/ottawa-protests-frozen-bank...
[2] https://nhglobalpartners.com/china-social-credit-system-expl...