What can someone do with your SIM card number?

What can someone do with your SIM card number? If someone puts your SIM card in their phone, provided the SIM is network compatible and unprotected, they may be able to impersonate you, send and receive calls and messages as you, use your data plan, access your social accounts, sell your information, and possibly gain access to your bank account.

If someone puts your SIM card in their phone, provided the SIM is network compatible and unprotected, they may be able to impersonate you, send and receive calls and messages as you, use your data plan, access your social accounts, sell your information, and possibly gain access to your bank account.