Signal PIN currently serves a different purpose: it enables registration lock, which is a defense against number porting attacks. https://support.signal.org/hc/

Signal PIN currently serves a different purpose: it enables registration lock, which is a defense against number porting attacks. https://support.signal.org/hc/en-us/articles/360007059792-Signal-PIN#manage_registration_lock https://support.signal.org/hc/en-us/articles/360007059792-Si...