What is SIM hijacking and how do they do it? SIM swapping is essentially the process of hackers activating your number onto a SIM card of their possession. The process helps them take over your phone number, so next time someone tries to access your online banking account, the cybercriminals are the ones receiving the verification passcode instead of you. This is usually effective when someone wants to reset your password or already knows your password and wants to go through the 2 step verifica