iMessage texts contain a thing called end-to-end encryption that regular SMS texts don't. This is what protects your communications from getting intercepted by hackers or other unwanted third parties while going through networks.
SMS offers a much greater reach than iMessages because SMS can reach all mobile phones (and other text-enabled devices), irrespective of whether the operating system is Android or iOS. That's why SMS is used as the fallback channel when iMessages fail to deliver over WiFi or mobile data.
The Recipient Wasn't Using an Apple Device at the Time
Remember, iMessage only works between Apple devices. So, if your family or friend switches from an iPhone to an Android smartphone, for example, your iMessage will automatically be sent as a text message to them.
iMessages are delivered via Apple's encrypted servers. This provides an added layer of protection that regular SMS messages don't have. Monitor delivery. iMessages are able to notify you if the recipient has received or read your message.
On your iPhone, go to Settings. Tap Messages. Set iMessage to Off.
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.
If the notification “iMessage Sent as Text Message” only appears occasionally, it may simply be due to poor internet connectivity. However, if this happens consistently with one particular contact, there may be a chance that you have been blocked by them.
Why should you turn off iMessage? If you switch from iPhone to Android, you must turn off iMessage. Otherwise, texts from your iPhone friends won't be delivered to your new phone since your number is still registered on iMessage. You will have to create a new group chat with your iPhone friends on your Android phone.
The number of iMessage users around the world was estimated to be 1.3 billion in 2022. With Apple being such a popular company making devices loved by everyone all over the world, iMessage has always been popular and had many users. In 2021, iMessage reached the 1 billion user milestone.
iMessage is a free and secure messaging app that you can use on your iPhone, iPad, Apple Watch, or Mac laptop.
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 you see green bubbles, this means that your text messages are being sent through SMS, and they might have blocked you on iMessage. For example, if you send me a message and I receive it with a green bubble, this means that the message was sent through SMS rather than iMessage.
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.
If the iMessage never shows a “Delivered” or “Read” message, and it's still blue, then you may have been blocked – but not always.
On the Messages screen, swipe down to the Message History section, and tap Keep Messages. You'll notice it's set to keep SMS and iMessages Forever. Change it by tapping the 30 days option or 1 Year.
Apple turns texts between iPhones and Android phones into SMS and MMS, out-of-date technologies from the 90s and 00s. But Apple can adopt RCS—the modern industry standard—for these threads instead.
You can choose to automatically delete your iMessages from your device after 30 days or a year, or to keep them on your device forever.
Your iMessage is disabled:
If your iMessages are off, your iPhone will only send simple text messages to all contacts. Therefore, you can go to the iPhone settings, check for the iMessage service, and turn it on.
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.
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.
Since Android and other carriers operate within the SMS and MMS standards of text communication, these green texts are more versatile in who they can reach with their texts. Blue messages, or iMessage messages, are compatible within the Apple ecosystem. Apple backs up all of these messages.
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 all of your iPhone messages are green, you should make sure iMessage is turned on in Settings.
You must ask the recipient to enable the read receipts option in their Messages app. Only then can you see if the person has read your text.