Cell Phone is a cordless telecommunication equipment. Generally radio frequencies are accountable for connecting mobile radio transmitters to recipient and transmission base stations. The process of radio frequencies transmission from one cellular phone to the other is possible through various functions and parts of the cell phone. These major parts are LCD Screen (Liquid Crystal Display Screen) is the screen at the front with small electric powers. Menu Button for activating the menu, Keypad, Antenna, Battery, Microphone, Earpiece, Power Switch, Battery terminal, Power IC, Oscillator, Frequency divider, CPU, Flash Chips. Cellular phone is a necessity for most of the people all through the world. In such a situation, life comes to a standstill if there is some fault in your cell phone and it needs some repair. Some simple steps must be followed if your cellular phone is not working. First find out if there is problem with the battery or phone. If you’re unable to hear the callers, ensure the volume is turned high; battery is fully charged and turn the ringer on. Repairing a cell phone requires some techniques and sophisticated tools like: Cleaners – Used for cleaning dirty pins on the phone. Lamps – Used during repair for protecting your eyes while you work. Phone opening Tools – Magnetic Alloy-Steel Screwdrivers with various tips are used for opening up cell phones. Programmers – Cell phone repair needs the phone to be unlocked. All cell phones cannot be unlocked. Programming tools are the only way for repairing phones which are non-functional. Ultrasonic Cleaners – Used for cleaning the PCB board of cell phones. If your cell phone goes faulty, do not panic. Following these simple steps will surely make your cell phone work. iPhone uses a 3.5 inches (9cm) LCD HVGA touch-screen with a scratch-resistant glass, specially designed to be used with fingers for multi-touch sensing. Since the screen is capacitive touch-screen, bare skin is needed. Most stylus or gloves prevent the required electrical conductivity. The Screen is able to render approx 262,144 colors. The display responds to the three sensors. Proximity Sensor usually shuts off the touch-screen and display when iPhone is brought close to the face while calling. This usually saves battery power and prevents unintended inputs from user’s ears and face. Ambient-Light Sensor generally adjusts the brightness for display saving the battery power. 3-Axis accelerometer basically senses orientation of phone and accordingly changes screen. Music playing, web browsing and photo browsing support both right or left and upright widescreen orientations. Double tap on iPhone screen is convenient to zoom in and zoom out text and images at a go. This is generally a very cool application for viewing photos on iPhone photo app. Toggling between letterbox mode and fullscreen mode is possible just by double tapping on screen. Browsing is also more fun as you could zoom in and zoom out content with the trick of double tapping. In case of any fault with your iPhone you need not wait and leave yourself stuck for days and weeks while your phone undergoes repair. You can carry out the repair by yourself and with confidence. Not all repairs are very technical, your repair may only include change of iPhone case if there are too many scratches on it, replacement of docking station, replacement of non-chargeable battery or possibility of buying some accessories and fixing them. – These are really basic repairs to your iPhone and need only simple skills – however you would find advice and tips to assist you finish the tasks successfully, and a lot faster. Major technical repairs can be replacement of screen, replacement of broken communication, motherboard or broken headphone-jack. Though such types of iPhone repairs are much more technical but they are possible. A little research and learning can go long way and help you save serious amount of money and time.