What purpose does iMessages serve on iPhone when you have to be connected to Wi-Fi for it to work?

What purpose does iMessages serve on iPhone when you have to be connected to Wi-Fi for it to work?

Simple. It's a totally free Instant Messaging service which can be used to instantly contact any iOS device workdwide.

And no, it does not require Wi-Fi to work, just an active data connection whether GSM or CDMA makes no difference.

IMessage works on any internet connection - be it 3G, 4G or Wi-Fi

It was developed as a way to get around limited number of text messages, charges for international texts and character limitations.
It can also work with iPods and Macs.

It was not the first such service.

IMessage is a legacy app from when carriers didn't give you unlimited SMS messaging. Apple leaves it baked in as default to retain customers.

Not necessarily Wi-Fi. Have to have an internet connection be it Wi-Fi or data. It is like any other instant messaging app. WhatsApp, Facebook Messenger, etc.

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