Look at http://support.apple.com/kb/ht3939 to nail it down.
But I find it rarely matters when it comes to DVR apps. The usual issue is setup which may require sometimes costly support.
I think this is an older Apple IPhone with AT&T, can't find the model number, tried looking through the phone's menu, couldn't find any information..
Have EverFocus ECOR264D-2 home security system and it says you can connect the DVR and IP camera from your smart phone, don't know if an APP available to set the phone up to do that or not? I think the App is called MobileFocus, need to know how to do this so can view video streams and control the cameras through the phone.
I'd appreciate any help.