I don’t even know where to begin. This is ridiculously naive on so many levels.
Like the frontend application has any bearing on this - seriously?!
And even taking a less literal interpretation - a 14 year old telephony stack with 3G as highest supported technology won’t do you much good. Heck; most of what we are running now are probably even improved versions of it.
And where do you suppose you’d get the source code anyway?
As pointed out time and time again, basic mms support is generally a configuration problem now.