AT&T: Give us $10 per month to access your existing family plan data bucket.
Me: Okay and how much more data do I get in my bucket per month?
AT&T: None, but you have to lock your SIM card to our network.
Me: Um… brb.
T-Mobile: please accept our offer of 200mb/mo of free LTE data.
Me: Thanks, I will!
[several months pass]
T-Mobile: Hey, you’ve used over 80% of your 200mb allotment this month. Toss us $10 and we’ll give you 5gb.
Me: Ha! What’s the catch?
T-Mobile [sheepishly]: You have 150 days to use the 5gb, BUT we promise not to dip into this bucket until you exhaust your free 200mb.
Me: Wait, that’s not a catch?
T-Mobile: I love you!
Me: I know.