Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Fits, but you lose auto screen off and on funtion (8310)

I originally bought a holster from SunCom when I purchased the Blackberry Curve 8310 and the phone fit snugly into the holster and the screen light promptly and automatically shut off when holstered and then lit up promptly upon de-holstering.My original holster also was extremely easy to de-holster with one hand but I find this one is more difficult.This holster's fit is different and there is a substantial gap between the screen and the holster back.Also, and very important to me, was to discover that the auto screen off and on function won't work with this holster for whatever reason.So if you want a holster, this one holds the Curve 8310 but forget about the battery saving auto screen light off and on function.