There are exceptions.  They make good investments.
AT & T was one until the government busted it up.  Now phone companies are just electronic robbers.
		
		
	 
The robbery has only shape-shifted, that's all.
Under the old Bell Telephone > A T & T before breakup, you were robbed by the universal REQUIREMENT that you were forced to rent your telephone from them (at what was an exorbitant rate at the time, I think it was like $8 a month or something).  Also, long distance calls were incredibly expensive.  Monthly costs of the landline connection were very cheap.
Some localities had "General Telephone" and some places had local phone companies which almost always provided crummy and unreliable service.  Some of these local companies still exist (even in the county I'm living in), and they've generally caught up with the big boys for quality of service, etc.
AT&T, General Telephone, or whatever local company you had, were all almost always absolute monopolies, with carved-out, demarcated territories.
Now, the landline connection is very expensive...BUT long distance is incredibly cheap***, and a landline phone (if you can find one) can be bought for probably the price of a couple months of rental.  I actually think that "the phone company" still had the rental option, which was used by almost nobody, into the beginning of this Century.
***Long Distance is rarely "bought" from the same company that provides the connection anymore, nowadays.
I'm excluding all comparisons to cell phones and such above, because it keeps the comparison "straight" instead of "comparing (certain branded computers) to oranges."  
However, it also should be noted that those who have data plans on smart phones nowadays, Long Distance is almost an afterthought and is, for all intents and purposes, free.