Text Messages Showing a Red 'X'

If you are seeing that some of your text messages are showing a red 'X' this is an indication of an 'undelivered' message. 

Here are some common reasons why the text was 'Undelievered'

1. The destination carrier is reporting the 'To' number is unknown, or no longer in service.
2. The destination carrier is reporting the 'To' number is unreachable - the device is likely powered down, out of the service area, or may not accept your messages.
3. The destination carrier is filtering out your messages for delivery.
4. Your message has been blocked from reaching the destination.
5. The destination is a landline phone, or the destination carrier can't be reached.