Does she want touch screen? Does she want lots of apps or just the basics (FB, tip calculator, camera, etc.)? Is she comfortable typing on a touch screen or would she prefer a QWERTY keypad?
I have a Blackberry Q10. It's touch screen, but has a QWERTY keypad (does make the screen smaller, but I text a lot, so the keypad is more important). I don't get as many apps as other operating systems but I get the ones I need (gasbuddy, call blocker, flashlight, color LED - this last is wonderful, I have my contacts color coded and I can keep the ringer turned off and know who's calling/texting/emailing by simply looking at the color and speed of the indicator light. I can discreetly know who's contacting me while in a meeting, etc.).