Skeptik
Banned
MtN should rethink this. I mislaid a recharge voucher. When I 'found' it I entered the PIN. It didn't work. Thinking I had entered something wrong, I tried again. <<**Boom**>> , lockout.It's totally reasonable. Without this mechanism there will be thousands of computer generated retries with PIN permutations (fraudulent attempts). This will in turn overload the recharge mechanisms to such an extent that regular customers cannot use the system.
This has been seen in the network during times when bugs allowed this kind of behaviour.
Also the MtN mechanism isn't great. Sometimes I enter everything correctly and the system hasn't accepted it. {I haven't had a system related problem recently though.}