IPhone 4 screen weird behavior?

When I scroll down on my iPhone and keep my finger on the screen, the screen will shake uncontrollably. And when I try to type on it, it will randomly type other letters that were not even close to the letters I was trying to type. What is up with my phone? Any suggestions on how to fix this? I just noticed this problem about a week ago and nothing drastic has ever happened to my phone, however I did drop it and had to get the screen replaced by some kiosk in the mall claiming to have apple parts but of course it was not true. That was 5 or 6 months ago and I have not had any problems with screen until now.

See that window over there? Remove the diamond encrusted case from your phone, open the window and fling the phone as far possible outside. Invest in a GS4.

My iPhone accepts an outlook invite every time I check my messages sent file… Same invite over and over and over again. Any ideas?

  • Why do Black and Mexican men have very erratic behavior? Where I go to school black guys curse and yell at each other in hallways while classes are going on. Referring to one another as the N Word and the F word and disrespectful word for women. Also one Mexican guy in my class Always takes his iPhone out and starts playing Mexican songs out loud. Literally no one says a thing to him.
  • My iPhone 5 screen is acting weird? When I plug in my iPhone 5 to charge it starts acting weird. When I'm texting or typing it won't hit the key and won't scroll down or up right, it also freezes but when I in plug it it's all better. I don't have the charger it came with because I got the phone online and it was used. It might have been something the previous owner did but I don't know.
  • IPhone screen showing weird colors? I was watching a movie on my iphone 4 last night, but I fell asleep. When I had awoken my phone was under me and when I turned it on the screen was showing weird colors, and I can't see the screen unless I put pressure on it, and when it shows, the colors are negative
  • IPhone 4S has weird lines across the screen I have dropped my iphone on carpet and it landed on the case but now has weird blue, yellow sometimes red and white lines across the screen. Help? Will Apple replace it? Can I fix it? Is there a repair place that will fix it?