Are you using the app (premium) or pics to text (auto)?
To take/send manual photos, camera in setup and on the network, point camera at something, press OK to take pic, OK again to send, watch screen. It should say “sent”. If you are using auto, pics should come to phone IF you entered your phone number into the camera correctly (with the proper @ info at the end, e.g., @mms.att.net for an AT&T phone number, @vzwpix.com for a Verizon phone number).