@Danih17 Sounds like you're attempting to use MMS vs SMS, MMS may require additional settings. Is the device an android that is unlocked and if so have you updated the APN settings? Here is a link to our web page with details on what the APN settings should look like:
https://www.cricketwireless.com/support/switch-to-cricket/bring-your-own-android.html
Remember to always mark posts that resolved your issue with Accept as Solution. You can even mark multiple posts in a single thread. This will help other users find this information too! Use the Kudos Button to offer a thumbs-up for good content.