Most notable the phone overheats when using apps or even just talking on it(not always), when charging (again not every time) and even when not in use. When phone is hot can't send texts and phone is extremely slow. After reading various forums looking for a solution I deleted facebook and messenger apps (I have to use FB for work so I login through browser). This helped the problem some but it still occurs just not as often. Also completely unable to access my voicemail.