I'm looking around for a good starter phone for my 12-yr-old daughter. She's got small pockets & doesn't often carry a purse yet, and she already has a Nexus 7, so I think the phone screen ought to be 4" or smaller. I'd also like it to run Android 4.x just to keep it half-way modern regarding app support. She's a good photographer, so it would be nice if it had an average-or-better camera. She doesn't need much horsepower, and I'm kind of planning on buying used if possible. It'll be used on Ting, which uses Sprint phones on the Sprint network.
Any recommendations? My son just upgraded out of a Samsung Transform Ultra (M930), which we haven't sold yet. It's the right size (3.5") and price, but it runs Android 2.3.6 and the camera isn't very good. It had been running pretty slow, but I think it would do much better after a factory reset cleared off all his crap.