Send them an SMS message When you send them an SMS and you get the "Delivered" notification underneath it, you weren't blocked. If you get a notification like "Message Not Delivered" or you get no notification at all, that's a sign of a potential block.
If your message was sent successfully, you'll see the words “Delivered” or “Read” (if they have Read Receipts on) below the last iMessage that you sent them. If you don't see these words, it means they either didn't get your message, don't have adequate service to receive messages, or might have blocked you.
If you send a message as a regular SMS in the green text bubble and you do not get a “Delivered” notification but instead get a notification similar to “Message not Delivered” or no message at all, that means you were probably blocked.
When you're blocked on iMessage, Apple's messaging service prevents your instant messages from getting delivered to the person you're trying to reach. If you have text message fallback enabled, your device will resort to sending the message as a text, meaning the bubble will turn green after someone blocks you.
Check the chat bubble color
The delivery status appears underneath the bubble when you enable Read Receipts in the iMessage settings menu. If the chat bubble is green, that could indicate someone has blocked you, especially if your chats with this person used to be blue.
Android phones move all blocked messages into a folder on the phone called “Spam and Blocked.” That means that the phone is still collecting messages from the blocked people; they just aren't notifying you. This can be a lifesaver in needing those blocked messages for various reasons after the fact.
If the iMessage never shows a “Delivered” or “Read” message, and it's still blue, then you may have been blocked – but not always. If the iMessage goes through and shows a “Read” receipt, then you have definitely not been blocked.
Android users may determine if someone has blocked their number by checking notifications. If the “sent” icon changes to “delivered,” the receiver is likely not blocked you. On the other hand, if it stays on “sent,” there's a good chance they have blocked your number.
A red flag that you've been blocked is when you don't see the delivery status or the read receipt at all. The message you just sent will still be in a blue bubble, but it will have no delivery status below it – not even a "Not Delivered."
So if you send a message to someone who has blocked you, then everything will look normal with you. You will also see Delivered Status if you send messages via iMessages - but the message does not reach the recipient. The recipient will also not be able to see that you have tried to send a message to them.
Their status appears as “unavailable” You cannot send them any messages, and if you try, you will get a message saying that the user is unavailable. If you try to call them you will hear that the number is busy or unavailable. If you search for them and get no results.
If your iPhone messages are green, it means they're being sent as SMS texts rather than iMessages. You'll always see green when texting Android users, or when you're not connected to the internet.
The recipient opted out of messages or blocked your number
Similarly, if a recipient blocks your phone number, your message won't be delivered. This is the likely explanation if you don't see a “Delivered” or “Read” message notification.
Use another phone number
You can try texting them by your secondary phone numbers, office phone numbers, or the phone numbers of some friends or relatives. It is highly likely that you will receive a response from the person who blocked your number.
Blue is iMessage. Delivered & Read messages depend on whether the recipient has ' Read Receipts' switched on or off. You cannot force a read receipt if the person to whom you sent has them switched off.
iMessage not saying “Delivered” simply means the messages has not yet been successfully delivered to the recipient's device due to some reasons. Reasons could be: their phone not having available Wi-Fi or cellular data networks, they have their iPhone off or on Do Not Disturb mode, etc.
When someone switches to a new device that doesn't run on iOS, they may leave their phone number in the app. In that case, you may not get the “Delivered” tag if you message them, but the message bubbles will be blue.
The Contact Blocked Your Number
A sign of a blocked number will usually be if you don't receive a delivered or read notification when sending a message. There is no way around a blocked number unless the recipient decides to unblock you.
A green bubble simply means you are sending her a message through cellular SMS communications. It does not mean you're blocked. It's on for iMessage.
If you see a green message bubble instead of a blue one, then that message was sent using MMS/SMS instead of iMessage. There are several reasons for this: The person that you sent the message to doesn't have an Apple device. iMessage is turned off on your device or on your recipient's device.
A green text message on your iPhone isn't a sign that your phone number was blocked, or that the text was not delivered. Instead, it means that the message was sent as a standard SMS message rather than an iMessage, which will appear as blue.
Blocking is a function that allows users to prevent someone from contacting them via phone, text message, or iMessage. If you have been blocked, you will not be able to send iMessages to that person. Instead, your messages will be sent as text messages, and in some cases, they may not even be delivered.
If you have been blocked on an iPhone, a few things can give you some hints. You can send an iMessage or SMS — if they are not delivered, you may be blocked. Or if you phone them and go straight to voicemail, that is usually a sign of being blocked too.