If you suspect someone has blocked you on your iPhone but want to be certain, there are a few additional tips to consider beyond the basics. Firstly, when you send an iMessage, check the delivery status; if it never shows "Delivered" or "Read," you might be blocked. Also, try calling the person—if it goes straight to voicemail without ringing, it adds to the signs. Another useful mechanism is to look for changes in message effects or the lack of "Delivered" receipts over time. Sometimes, simply switching from iMessage to standard SMS by sending a message when out of Wi-Fi can help detect blocks since SMS delivery behaves differently. Moreover, do not forget that sometimes network issues or the recipient’s phone settings can mimic the same behaviors as being blocked. To eliminate these possibilities, try contacting the person through alternate methods like FaceTime or WhatsApp. If these methods also fail or show unusual behavior, it’s more likely you have been blocked. I personally recommend maintaining a respectful distance and communication approach after confirming a block to avoid relationship discomfort. Understanding these iOS messaging nuances helped me clarify situations and avoid misunderstandings entirely.