I've never been able to successfully buy data bundles via USSD on this phone. There is nothing wrong with the sim, because it works just fine on other phones.
On the Samsung Star, I gets to the final step of purchase, and you choose 1 to confirm, it gives the following errors:
"Rejected by network"
in two seperate dialog boxes.
Anyone else with this phone having the same problem? And, more importantly, how do I fix it?