Smartphone Repair at CPR Cell Phone Repair (Up to 50% Off). Three Options Available.

Ellicott City

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Repairing a cell phone is best left to professionals, who are trained to remove cracked screens without spilling all the contacts everywhere. Keep your affairs in order with this Groupon.

Choose from Three Options

  • $15 for $30 toward iPhone 4/4S screen replacement
  • $20 for $40 toward iPad 2, 3, or 4 screen replacement
  • $40 for battery replacement for an iPhone 4 or 4S (up to a $80 value)

Touchscreens: Power at Your Fingertips

To learn what's behind the face your smartphone shows to the world, read on.

Most electronic touchscreens—such as the kind on your smartphone, perhaps—rely on electricity. Not just the obvious electricity provided by their power supply, but your electricity, as in the tiny amount that runs through your body or the large amount that runs through your body if you're a Frankenstein. Capacitive touchscreens are set up to detect any change in the electromagnetic field they produce, such as that created by a bare fingertip. Beneath the glass screen, a network of electrodes stands ready to relay information about the location of the touch to the device’s microcontrollers and translate it into a command.

Another Path: Resistance

There is another, slightly older form of touchscreen technology, which requires the hand to apply not electricity but pressure. This type is known as a resistive screen and is frequently still found at checkout counters and on PDAs. Beneath its surface are two layers of conductive material. Pressure forces the two layers to connect, completing a circuit; different points on the screen will produce a current with different voltage, which allows the system to pinpoint the precise location of the touch. Although these screens are lower-resolution and can't respond to multiple simultaneous touches, they do have one advantage over capacitive screens: they'll work even if you're wearing gloves or oven mitts.

Bonus Points

  • There are plenty of other, less common ways to create a touchscreen. Some devices send ultrasonic waves continually across the screen, which are interrupted upon contact; others, including Microsoft's Surface tabletop screen, sense changes not in pressure or electric charge but in light.
  • Capacitive screens have also been developed that can register how hard you're pressing. When you press down harder on anything you'll notice your fingertip spread out to contact more of the surface. Newer screens take advantage of this fact and track whether you're contacting an increasing number of capacitors.
  • CPR Cell Phone Repair

    CPR Cell Phone Repair brings gadgets back to life with a variety of services. Its deft team repairs phones suffering from maladies such as water damage, cracked screens, and charging issues. Gamers take solace in CPR’s ability to expertly handle the popularly named “ring of death” that can plague consoles. They also repair LCD screens for tablets and laptops. Customer can mail in their gadgets, drop them off at the store, or sit comfortably and wait while their devices are fixed.

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      Ellicott City

      9050 Baltimore National Pike

      Ellicott City, Maryland 21042

      410-480-0277

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    In a Nutshell

    Skilled technicians fix cracked smartphone screens and replace batteries for iPhone 4 and 4S devices

    The Fine Print

    Expires 90 days after purchase. Limit 2 per person, may buy 2 additional as gifts. Limit 1 per visit. Valid only for option purchased. Must use promotional value in 1 visit. Excludes other discounts. Walk-ins welcome. Not valid on iPhone 5s, 5c, iPad mini, or iPad Air. Option 1 is $30 towards repair for iPhone 4 or 4s only. Option 2 is $40 towards repair for the iPad 2, 3, or 4 only. Option 3 for the battery replacement only valid for iPhone 4 and 4s. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

    High-tech products, such as smart phones and GPS receivers