Within the past few months of getting my HTC Sensation XL I have encountered several problems. Firstly, when i am using the phone casually (ie, not pressing anything just checking the time or reading a message) the screen jitters. Secondly, when i am typing a message (email or text) the phone starts entering in other letters. The thing is this has occurred in two completely different phones, as when using the first the LCD screen cracked and i had to send it off to be replaced, which was then returned with a broken speaker, so they have sent me back a new phone which has been coming up with the above problems again. Do you guys have any advice/help you can give me please? Thanks. Mattydev.