Re: What text app are you using?
I use hover chat. Really like it but it seems to have some issues with MMS at times. It will ALWAYS revert to data from wifi when sending or receiving an MMS. I dunno, maybe it's meant to work like that, but I'd certainly rather use wifi. Other than that though it is great. I love the ability to reject or directly reply in the window no matter what app I am in.
My biggest gripe with texting apps these days is that they are all going to a subscription pay system. I will never use a texting app on a subscription. Paying $5 or so as a one time payment maybe, but not a subscription. If they all go that way, I'll just be using the stock app.