It seems to me that cellphone "plans" are among the most deceptively advertised things anyone can buy.
Tmobile (I think it is) advertised "$45 per month, period." But the actual cost is over $60. The taxes and fees and other bullcrap are outside the period. The people behind the counter are entirely unaware of the crap that their company advertises. Several of the "plans" advertised locally have these fast talking voices that no human could ever understand that used to only be heard on car ads for the cheaper models leased to gullible peasants.
The one constant is that ATT will always be the most expensive. And NOT the best service, for sure. mentioning dropped calls to them brings no results. Apparently, according to the terms of the contract, all one's calls could be dropped and they would still be able to repossess your firstborn.