Gsm Multi-hub Modem Unlocker -
You must own the hardware. Unlocking a leased or rented modem is illegal. Furthermore, using an unlocked modem for illegal SMS bombing or SIM box fraud (bypassing international termination rates) is a felony in most jurisdictions.
Manual installation of specific .dll files (like P2kapi.dll ) is often necessary for certain brands. Gsm Multi-hub Modem Unlocker