Differences Between iMessage and SMS

iMessage vs. SMS (Text) Messaging

iMessage and SMS are two very different ways of communicating via texting.

iMessage is Apple's means of "free" text communication that uses Wi-Fi or your data plan (3G) to send both text and picture messages. iMessages can be sent between any Apple devices that have the iMessage app and they are indicated by a blue text bubble (see Example 1). iMessage provides a few conveniences that SMS messaging does not:

  • messages are sent to all of the recipient's iMessage accounts to ensure delivery
  • you can message within a group of people (provided they all have iMessage)
  • you can see when other members of the conversation are typing via a '...' bubble (see Example 2).
  • you have the option to let your friends know when you've read their messages (see Example 3).

SMS messaging is the typical form of text messaging that uses your phone's text plan to send messages to other phone numbers. This will be indicated by a green text bubble (see Example 4). Your iDevice will default to SMS messages when iMessage is not available or when you're texting someone without an Apple device.


Example 1
Example 2
Example 3
Example 4
Step 1

Turning iMessage ON/OFF

It is recommended that iPhone users keep iMessage on. The benefits it provides are much more useful than typical SMS and they use nearly negligible amounts of data to send.

* Please Note: Sending picture messages over iMessage does use a larger amount of data. If you do NOT have a data plan or have little data available, you can turn iMessage off using the following steps:

  1. Enter the Settings menu on your device via the icon shown to the right.
  2. Scroll down and select the 'Messages' option.
  3. Flick the 'iMessage' switch into the desired position to turn it ON or OFF.
  4. You can also choose to send your friends 'Read Receipts' in order to notify them that you have read their messages.
Step 2
Step 3
Step 4