Are you receiving the message "Sim Network Unlock Pin" from your Samsung Galaxy S7? That means that your Samsung Galaxy is still network locked and cannot use sim cards from other service providers. Just simply insert the 8 digit Samsung Network Unlock Code and we can factory unlock your Galaxy S7 to use other providers. We can even unlock the devices your carrier will not unlock for you, whether it is unpaid bills or blacklisted. Here is a real customer review:

Unlock Samsung Galaxy S7