Q: I am unable to send text messages in Message. I can receive messages but not send. I am able to do both with my iPhone. Why can't I send?

Hi Kathy,

Happy Holidays!  Do you have an iPad with cellular service and a text-messaging plan?

Send messages with your iPhone, iPad, or iPod touch - Apple Support
http://support.apple.com/en-us/HT201287

What's the difference between SMS/MMS and iMessage?

SMS/MMS lets you send text messages and photos to other cellular phones or devices. iMessage lets you send text messages and photos to another iOS device over Wi-Fi, without worrying about text-messaging charges (cellular data charges may apply).

 

What do I need to use SMS/MMS and iMessage?

Here's what you need to use SMS/MMS and iMessage:

• SMS/MMS: A text-messaging plan. Contact your carrier for more information.
• iMessage: An iPhone, iPad, or iPod touch with iOS 5 or later.

How do I know if my message used SMS/MMS or iMessage?

You can tell which type of message you're sending by the color of the Send button and text bubble.

• SMS/MMS: Send button and text bubbles are green.
• iMessage: Send button and text bubbles are blue.

How can I link my iPhone number with Messages on my iPad, iPod touch, or Messages for Mac?

When you sign in to Messages with your Apple ID on your iPhone, you link your phone number to your Apple ID. If you then sign in to Messages with the same Apple ID on your iPad, iPod touch, or Mac, Messages will link that device to your phone number as well.

I hope this information helps ....

- Judy