Help Proximity sensor ?

[beano52]

My girlfriends shift is about 3 months old. It recently started running slower and a few minor crashes but the worst thing (and happening more frequently) is the screen goes black during a call and to "bring the screen back" she has to slide the keyboard open.

I have an EVO and I know the proximity sensor causes mine to go black but I never have a problem with the screen coming back on when I pull the phone away from my face.

I guess my questions are... Does the Shift have a proximity sensor (and where is it located, behind the ear grill, left, right of ear grill?) and is this a warranty issue that Sprint may exchange the phone out (aprox. 3 monts old)?

Added: She does have a clip on cover and it seems to "sorta" hold the front away from the back, allbeit literally 1/2 mm if not less.

Thanks in advance!

 

[beano52]

Update:

I did a little testing this afternoon and I can add that the screen stays on when an INCOMING call is answered. The screen goes "black" and stays off, requiring the keyboard to be opened, when you PLACE a call from the Shift

 

[beano52]

Well, took it by the Sprint store last night and got it fixed. The tech didn't really expand on what was wrong but they did "hook it up and run a program on it" what ever that means. It took about 15 mins and is working now.