Cant send or recieve mms messages

Is your internet and text messageing for incomming and outgoing working? If it is you will need to contact your carrier and let them know...they will collect some information from you and send it off to thier engineers to have your issue fixed...it might be something as simple as you need the correct feature or settings on your account adjusted. Also if it's unlocked...there's no guarantee that the internet will work on another carriers network therefore it limits what other features you can use...such as mms (which is one part internet and one part text message). Good luck