I do as well, but I was looking for something like my wife has instead of a little window, it's just a little circle with that person's picture in it.
There is an alternative to the Facebook Messenger app called Ninja SMS and it has the chat heads, but I cannot get MMS to work with it. I have the APN settings correct, but it just doesn't seem to want to send out any MMS. I am hoping that it has nothing to do with me not having a data plan. MMS works through the normal SMS/MMS app on my phone.
No data plan = no MMS....that's your issue...SMS works differently so it will work. When you send an MMS message that is the equivalent of sending an email which you need a data plan to do so.
Sent from my VS980 4G using AC Forums mobile app
You're talking about when using third party apps you are unable to send MMS messages?
I can send MMS messages when using the stock app with no issues after getting the APN settings adjusted by talking with a T-Mobile CS person. This is with having no data plan.