USSD - unstructured Supplementary Service Data (USSD is a service that allows high-speed and interactive communications between the user and applications across a GSM network. Basically, USSD allows you to request services by entering a specific short sequence of characters on the handset, such as *111#)
You clearly googled that, because I find a hit when searching for that description.
as you needed to google, I assume you didn't really know what it meant.
my point is you claim to research data related information, yet you still didn't even know what USSD's are used for. (That's okay)
90% of people buying bundles probably still do it by plugging the sim into their phone, buying the bundle, and back into the modem again.
Now that's fine too, a minor inconvenience.... but when it comes to R20,000 bills, something is wrong.
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