I have three lines on my account and I have old plans that I wouldn't want to leave (or my bill would go up even more).
So like the above poster, if I stayed with AT&T this is a $1200 every 2 year difference, or $50 per month price hike plus the unlimited price hike pretty big!

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My bill for 3 lines is $145 before tax, even if I picked the 5GB plan or something on family share, it's that same price or $10 more and it also doesn't have the subsidies, so some of us truly are losing out on the $400 per line every 2 years.