My phone plan. I'm paying 22 £ per month fixed price for unlimited calling, texting and 3GB data limit at full speed. I only make about 50-60 text messages at most and that's a lot for me, maybe 20-30 calls and 250-300MB data.
Those numbers are probably wrong, I barely use my phone anymore.
I have done this for at least a year. What a waste... Don't know why I haven't changed it yet.