No, this is exactly the kind of thing registration lock is intended to address. If you enabled Registration Lock, your account cannot be hijacked by sms, provi

No, this is exactly the kind of thing registration lock is intended to address. If you enabled Registration Lock, your account cannot be hijacked by sms, provided you’ve been actively using your signal account within the last week. There’s an automated keep-alive for the case that you still have signal installed but haven’t been sending/receiving any messages.