Okay. Previously it's nothing till I installed something from Cydia I don't recall which it is cause I installed quite much. These few days, I've been trying to change my wallpaper. But I can't! After comparing with another iPhone, I realise that Cancel and Set button in Move and Scale state, they touches the bottom. That's not the only problem. Today, someone called me and when I tried to PRESS Accept or Decline button, it don't works too! Never had this kind of problem till I install those apps from Cydia. Anyone could have help me? Tell me if screen shots is needed. I'll try to provide as much as I can. Thank you so much!