Set Up iMessage
iMessage is a free Apple service that allows you to send messages between iDevices using either your cellular data or Wi-Fi. If the message you send is blue, it's an iMessage; if it's green, it's a text message. To get iMessage set up, go to Settings > Messages, and then toggle iMessage on. With iMessage, you can send texts from your phone number, email address, or Apple ID. To specify which to send from, tap Send & Receive within the Messages menu. Here, you can add another email you wish to be reached at via iMessage and control which address it uses when starting conversations. How to Switch Between Keyboards
Whether you're fluent in another language or want to use a third-party keyboard to express yourself, you can do so by going to Settings > General > Keyboard > Keyboards > Add New Keyboard. From the list, you can add new keyboard options or edit them. Tap Edit in the top right to reorder your existing keyboards or delete them. Remember, you must have at least one enabled.
Now you can access other keyboards in apps like Messages by tapping the globe to the left of the microphone or holding down the globe, which gives you a list of the keyboards you've added.
Group Messaging is a great way to keep in touch with multiple people simultaneously. If you haven't sent a group message before, make sure Group Messaging is on by going to Settings > Messages and enabling the feature.
To start a group message, open the Messages app and tap the new message icon. Tap the blue plus sign to enter the friends you want to add. Then type your message and send it. To add an additional contact to a group message after you've created it, tap Details and then Add Contact. Choose the person from your Contacts list and press Done. Send and Receive Audio Messages
To send an audio message, press and hold on the microphone icon to the right of the text entry box in Messages and begin speaking. Lift your finger to end recording. To hear the message playback, press the play button; to delete the recording, press the X; to send the message, press the up arrow. When you receive an audio message, press the play button to enable it. Once you've listened to an incoming audio message or sent an audio message you've recorded, you can choose to keep it by tapping the word Keep beneath the message. Audio messages can only be sent over iMessage.