Telcos and Mobile Money services where I come from (Malawi, Africa) use USSD extensively and it works well. So much so that even though some Telcos have Android

Telcos and Mobile Money services where I come from (Malawi, Africa) use USSD extensively and it works well. So much so that even though some Telcos have Android applications for some of those services - people still mostly rely on USSD menu-driven applications to perform tasks like buying airtime, and sending and withdrawing money.