1. LCD display
   VCR display
2. DVD display

An iPhone 4 has a glass-coated LCD display.

1. three
   five
2. seven

The iPhone 4 built-in camera with LED flash has 5 megapixels.

1. touch screen phones
   conventional cell phones
2. smart phones

Though touch screen phones actually get the dirtiest, other types of phones are not immune to fingerprints, dust, earwax nuggets and the like.

1. toilet seats
   doorknobs
2. cell phones

According to a semi-scientific study by a British cell phone retailer, cell phones harbor more potentially harmful bacteria than doorknobs, computer keyboards and toilet seats

1. staph bacteria
   the seasonal flu virus
2. both of the above

According to a study conducted by doctoral students at Stanford University, staph bacteria and the seasonal flu virus can be found on the surface of a smartphone and they have a good chance of infecting you.

1. yes
   no
2. sometimes

Unless it's absolutely necessary, never open up your cell phone case on your own. It may void the warranty.

1. water
   Windex
2. a mix of 60 percent water and 40 percent isopropyl alcohol

The best solution for cleaning your cell phone's LCD screen is a mix of 60 percent water and 40 percent isopropyl alcohol available from your drug store. Isopropyl alcohol evaporates quickly so there's little chance that moisture will seep into your phone's circuitry.

1. They may scratch the LCD surface.
   They may fall apart when wet.
2. They may leave lint on the LCD surface.

The rough fibers of paper towels may scratch your LCD display surface. Use a microfiber cloth to clean the screen.

1. Use a Q-tip.
   Use a can of compressed air.
2. both of the above

To dislodge crumbs and dust from the cracks and crevices of your cell phone, wipe down the surface with a moistened microfiber cloth or cotton swab. A few blasts with a can of compressed air (the kind for cleaning computer hardware) should quickly dislodge any diehard crud.

1. UT light
   UV light
2. UL light

The latest hi-tech gadget, the Violight Cell Phone Sanitizer, uses pulses of UV light to destroy surface bacteria. You can also buy a small UV wand that claims to kill 99.9 percent of bacteria after only 10 seconds of use.