Review on 📞 Enf510 Call Blocker: Stop Spam Calls, Protect Your Privacy, Family Function | Caller ID Box for Landline, Answering Machine, and Cordless Phones by Jennifer Groom

I don't know how to rate this product yet. The instructions are unclear in translation. It seems to capture numbers to block when I press the block button after the phone rings or after it's in voicemail. If I'm fast enough, I press answer on the cordless phone in the other room, then #, then 6, then I hang up. It seems to grab the number from the caller ID. The instructions show a way to enter ad hoc phone numbers, but I haven't been able to do this using the instructions yet. And there's discussion of how to block IP phones, international ones, etc., but other than the two-digit international prefix in the caller id, those instructions don't make any sense either. So I don't know if the numbers are really blocked. Spam callers drop so many spoofed numbers that it's difficult to spot them unless you test them with a known number and then try calling again to see how the call is handled. That's why I'm giving it four stars because I think it works. I will update this review if I learn otherwise.