If you have an iPhone and try to send an iMessage to someone who has blocked you, it will remain blue (which means it's still an iMessage). However, the person you've been blocked by will never receive that message.
When an iPhone user blocks your number, you can't reach the person via iMessage, FaceTime, cellular calls, and SMS messages. Interestingly, you can still contact the person on third-party instant messaging and texting apps like WhatsApp, Telegram, and Signal.
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 an Android user has blocked you, Lavelle says, “your text messages will go through as usual; they just won't be delivered to the Android user.” It's the same as an iPhone, but without the “delivered” notification (or lack thereof) to clue you in.
Blocked text messages disappear
When someone that you've blocked texts you, their texts go nowhere. They won't receive any notification that they're blocked, and their messages will still look like they've been sent. But you won't receive any of them, and you can't respond.
A green bubble could also indicate that someone blocked you, especially when the bubbles have always been blue. When blocking occurs, iMessage sends your text, but the recipient never receives it. Your old messages remain blue, but the latest texts you send after they've blocked you turn green.
Take some time before you reach out to the person who blocked you. As tempting as it may be to reach out, waiting is usually a good idea. It's totally natural if you're wondering what went wrong. However, you're probably not going to get answers now—especially if you and the other person are both upset.
If you make a call and receive an automated message along the lines of “the customer is unavailable,” that person's wireless carrier may have blocked you. The messages can vary, but the result is the same. Your call won't go through.
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.
6. An iMessage Not Delivered error doesn't mean someone blocked your number. This is a common myth, and the iMessage "Not Delivered" error just means your text didn't reach the other person! If you're seeing the iMessage Not Delivered error, try enabling SMS texts on your iPhone.
The green message background indicates the traditional SMS text message. It actually means a message that you have sent to someone else is through SMS message service instead of Apple iMessage. Blue message background means the message is sent via iMessage technology.
The Recipient Has Changed the Phone
iMessage service is only available on Apple's hardware lineup, including iPhone, iPad, and Mac. If the recipient has changed their primary phone to Android, messages turn green on iPhone.
If you see your messages green when they should be blue, it can be caused by either the receiver's device is an Android, or there is no Wifi connection available.
Instead, a green text message on an iPhone is an SMS message that has been delivered to a phone that is not an iPhone or Apple device (ie. an Android). A green message can also mean that you aren't connected to the internet or that your iMessage is turned off in settings.
Some of the most common delivery failures happen because the number is invalid, the recipient opted out of messages, there were network problems with the recipient's carrier, or your message contained content that carriers frequently block.
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.
Check the Bubble Color
If you don't see a blue bubble on your end, then it's likely that they've blocked you on iMessage. It's important to note that this doesn't mean they have blocked your number altogether; it just means they have blocked you from sending them messages over iMessage.
Yes. You blocking someone on your iPhone only blocks their ability to send you a message. You can still send them one, unless they blocked you.