G920P (6.0.1) domestic unlocked – No MMS

Hello, I rooted my Galaxy S6 Sprint and used Octopus box to do a domestic unlock. I am able to get LTE, mobile data, and SMS but MMS will not work. I am using Cricket and have entered the correct APN settings. I can see that I am receiving a picture but it will not download and I can not send any pictures. I am using the stock Samsung messages app. Any suggestions?