I'm new to the cell phone world (don't ask). I love this phone, except for the storage issue. I was told adding an SD Card would help, but I though the vendor put one in. Settings-Lock screen and security says "No SD Card inserted." I only see one slot inside so where do I insert a new one. (Looking at a 128 Gig; I really like my music and photos!) I can't afford another phone, so... Also getting annoyed by the lock screen popping on while using the phone while charging.