iPhone call glitch
I recently purchased an iPhone (about a week ago) and it was working fine. Two days ago, weird things started happening. EVERY time i end or reject a call now, it makes the sound effect of taking a picture, then goes to a black screen like in standby, and instantly requires me to re-enter the password. It was not doing this before, but is also not the most severe problem. Every so often, also when ending or declining a phone call, the touch screen will just flat out stop working and will not respond to anything until I do a hard reboot or sync. Sometimes the touch screen works to slide the unlock slider, but the keypad will not respond for me to enter my pw.
I guess my question is, is this a hardware problem? Should I go back to the store? The thing is only a week old... or is this something that can be fixed by wiping it clean and re-syncing? Has anyone else experienced anything of this nature?