
A small hack in the handset’s programming would allow criminals to use someone else's phone number and receive their SMS. Thus, in certain countries where banks would send a one-time password called an mTAN (mobile Transaction Authentication Number) to a person's phone in order to allow the transfer of money to another account etc. the hacked cell phone users would gain access to accounts. The company in charge of the investigation, Ultrascan, managed to acquire a handset from the specified factory with specified firmware for testing and successfully reprogrammed the device to do exactly what the criminal would have it do.
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