Worked for a major phone company for many years (GTE), slight of hand is their stock in trade. Most folks wont protest their phone bill, and that is what they survive on.
I scrutinize my phone bill to the max, and protest any true or perceived discretion in my bill. If you protest long enough, your bill will suddenly become true and will remain so.
Is that just for cell phones or for regular phones (landlines) as well?