RAM 2500 2019 Owner's Manual page 661

NOTE:
Only use the numbering listed, otherwise the system does
not transpose the message.
TIP:
Your mobile phone must have the full implementation of the
Message Access Profile (MAP) to take advantage of this
feature. For details about MAP, visit UconnectPhone.com.
Apple iPhone iOS 6 or later supports reading incoming text
messages only. To enable this feature on your Apple iPhone,
follow these four simple steps:
iPhone Notification Settings
1 — Select "Settings"
2 — Select "Bluetooth"
3 — Select The (i) For The Paired Vehicle
4 — Turn On "Show Notifications"
TIP:
Voice Text Reply is not compatible with iPhone, but if your
vehicle is equipped with Siri Eyes Free, you can use your
voice to send a text message.
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