The simplest method is to check by calling another number. First, try calling your number. If the person has blocked you, you will hear a “temporarily not in service” message. Now, try calling from a different number and if you hear the caller tune then it means you have been blocked. In iPhones, if a person has blocked you, your messages will not be either delivered or seen. Of course, this might happen for other reasons too, like poor network issues or phone being switched off. But if the status of your message remains the same for a while then you can confirm your doubts. To find out if you are blocked on WhatsApp, you can check it from the last seen status. If the “last seen” of the person is not visible anymore, then it means the person must have blocked you. But, there is an option to hide your last seen on Whatsapp. So another way to check for it is to see the timestamps, if you don’t see the timestamps below the messages, then the person must have blocked you. You will not be able to view their profile pictures as well in case you have been blocked. Messages will not be sent to the person if you have been blocked. A single tick below the message is an indication of it. Another indicator is to try adding them to a group. You can add people that have blocked you to a group.