Look for the checkmarks: A single gray checkmark indicates a successfully sent message. The appearance of a second gray checkmark shows your message was delivered to the recipient's phone. The two checkmarks will turn blue if the recipient has viewed your message.
DELIVERED = confirmation the message has reached the recipient's phone but fails to show if it has been "seen" yet. "Delivered" is a good sign. It means that the text is ready and waiting for them to open it.
How can you tell if someone has read your text without read receipts? Two blue check marks mean the message has been read. You can press and hold the message to see what time it was read if you really need to. If the two check marks stay gray, the recipient may have turned read receipts off.
Sent: The mobile device has sent the SMS to the SMSC (Short message service center). And the SMSC has confirmed it has received the SMS. Delivered: The mobile device has received a SMS-DELIVER (Delivery Notification). Although delivered is a relative term in the SMS world.
It means that the message was not sent to their phone. When it doesn't say Delivered, it means the other person is texting someone else or on the phone. Once they stop texting or hang up the phone, you will see the text message has been delivered.
The most common reason text messages are not delivered properly is if the phone number is invalid. This reason makes sense as there's no way for the message to reach the right person. Usually, your phone carrier will alert you of an invalid number unless you have typed in the wrong number.
If it's green, it's an ordinary text message and doesn't offer the read/delivered receipts. iMessage only works when you're sending messages to other iPhone users using the Messages app.
The appearance of a second gray checkmark shows your message was delivered to the recipient's phone. The two checkmarks will turn blue if the recipient has viewed your message. To turn off this feature, click Settings and tap Account. Choose the Privacy option and disable Read Receipts.
You won't be able to see if someone read your iMessage text unless they have Read Receipts turned on.
If you haven't been blocked, the status will read "Delivered." And if the person has enabled read receipts, it will later turn to "Read" once they open the message. A red flag that you've been blocked is when you don't see the delivery status or the read receipt at all.
If the text message says delivered, that just means that it made it to its destination safely. If the recipient hasn't opened it, then it wouldn't show as “read”.
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.
Delivered means the message was successfully delivered from Apple's servers to the person you are texting. If the "Delivered" status never changes to "Read", this means the person never read the message/deleted the message before opening it or has "Send read receipts" disabled.
If the person who you sent a message to has their read receipts enabled, then they will automatically send a read receipt when they open the message. Some people don't have receipts enabled, and it's usually pretty easy to tell.
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.
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.
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.
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.
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 a small “delivered” icon appears next to the message you sent, then it has been successfully delivered. Additionally, you may see two check marks which indicate that your message has also been read by its recipient.
When a message is “read”, that means the recipient is ACTIVELY looking at the message (not just in Preview), and indicates attentiveness. By switching that option off, she's telling you that she doesn't want you to know if she has or has not read the message.
I believe "Delivered" means delivered to their carrier. "Received" means delivered to their phone.
If you call someone that hasn't blocked your number, you typically hear several rings before it goes to voicemail. When you call a number that has blocked yours, you may hear one or half a ring or no rings at all and then the call will go to voicemail.
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.