Yeah, I think the data plan should be a consideration on non-expandable phones.
My current plan is due to budget a minimal data plan, 500mb per month most likely.
Perhaps I am the minority who doesn't really feel the need to be using a lot when out, instead planning most of my usage at home on Wifi.
Whats the point in having a flagship phone and having to live this way? This reminds me of how data usage was back in 2005.