How do I update all the apps on my phone? How do I disable that crazy noise that appears all the time while doing specific things? How do I disable vibrations on everything but SMS and phone calls? How do I sign out of YouTube without signing out in my other Google apps? Should I use an Antivirus and which one? (I don't do any "dangerous" things and I don't click on everything that pops up btw) How do I make that eye scrolling and hand thing working? Can I buy apps without a credit card? (like the iTunes cards for example) What are the alternatives for the fallowing apps that I used on my iPhone: iBooks, iWork (Keynote, Numbers, Pages), iLife (iPhoto, iMovie, GarageBand), GoodReader, Star Walk, Solar Walk, Sky Guide, Exoplanet.