On iPhone and iPad, the “Messages” software combines both functions. The classic Text message is displayed in green, an iMessage is definitely highlighted in blue.
An Text message is dispatched as regular via the cellular network. An imessage pc message is sent on the internet.
An SMS could be received by every mobile phone owner. An iMessage can only just be sent to owners of Macintosh, iPhone, iPad and ipod itouch.
Your iOS machine instantly detects if the recipient can receive an iMessage. If this isn’t the case, a classic Text message will be dispatched.
Whether you send out an iMessage or an SMS, you usually see in the written text field (see picture).