I bit the bullet and purchased a new smartphone. I didn’t want to spend the money, but my six year old Galaxy Note 3 was frustratingly slow to use. It served me well, though–I have no complaints about it.
I’m on a payment plan for just about the rest of my life with AT&T for the new phone (but at least it’s at 0% interest). I was able to negotiate a better rate with my internet provider recently, so that will pay for most of it. The new phone is really awesome, by the way.