Harold is on TMobile and he's noticing that many robocalls are going straight to voicemail. Leo says that could be a false positive from TMobile's spam calling feature that routes the call to voicemail without you knowing that the call even happened. Leo says that try disabling that feature on your phone and see what happens. You'll likely get a ton more robocalls though. But when Harold reboots his phone, it goes away. The chatroom suggests disabling WiFi calling. Sometimes that can cause it. But Leo suspects its a call screening feature of your carrier. It could also be a spam technique called "Ringless Voicemail" where the spammer can send a prerecorded call directly to your voicemail.