Mobile phone accessories include any hardware or software that is not integral to the operation of a mobile phone as designed by the manufacturer.
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Cases
Cases, which are designed to attach to, support, or otherwise hold a mobile phone, are popular accessories for many phones, particularly mainstream smartphones. Case measures are based on the display inches (e.g. 5 inch display). There are different types:
- Pouches and sleeves
- Holsters
- Shells
- Skins
- Safety Straps
- Bumpers
- Flip cases and wallets
- Screen protection and body films
- Drop and shock protection
- Leather Case
Holsters are commonly used alone for devices that include rubberized padding, and/or are made of plastic and without exposed rigid corners. Heavy duty cases are designed to protect from drops and scratches.
A Standing case improves user experience, being specially recommended for multimedia, videos and audio. Folio case is a combination case and stand, and may include a keyboard (USB for OTG smartphones or bluetooth keyboard).
Skins and design covers can serve for protection and personalization. These are the result of the relatively "naked" designs produced by manufacturers such as Apple, where the metal and glass components of the device are exposed and vulnerable to damage. They are distinct from holsters, in allowing use of the device while in the case, but in many instances include a belt clip or other device giving it the functionality of a holster. They are made of hard plastic, rubber, or in the newer market adhesive-backed vinyl pieces. Vinyl skins can be ordered on many websites and come pre-cut to fit your cell phone or another electronic device. Vinyl material may be calendared or cast, with the latter being more expensive. Calendered vinyl is expected to only be used for short-mid duration (10 years) while cast vinyl is used on a more long term basis. Calendered vinyl also tends to shrink in the heat and can be shaped into any form (above 80 degrees Celsius) but might fade in direct sunlight.The today's standard of calendered films is almost as good as the cast vinyl. Cast vinyl avoids most problems, but costs up to 250% more. 3M has manufactured a cast vinyl product that they call "Controltac". This vinyl cover maintains a more glossy look and provides an air release channel that prevents bubbles during placement. The more popular is the cast vinyl because of the range of designs.
Customized phone cases use custom printing. Different companies have different methods of printing on cases, some utilize sublimation for printing on mobile phone cases, other methods include inkjet printed skins and Dye-Sublimation 3D printing methods.
Some phones have a replaceable cover. A release button on the cover lets it pop off to be replaced with the new cell cover. Phones that lack a replaceable cover can accept a slip on or snap on cover. These come in leather, vinyl, silicone, or hard plastic.
Functional cases can integrate an external battery, a USB, Bluetooth, WiFi keyboard and touchpad mouse in a similar way to tablets.
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Anti-lost and selfies wireless device
Antilost keychain can easily locate a mobile phone through the GPS and Bluetooth low energy antennas of the smartphone. Once the user is out of range, both the cell phone and device will alert the user. It also can be used to take selfies.
Mass storage
Some smartphones feature SD card slots (usually the smaller Micro-SD variant). These, in combination with a compatible SD card, can be used to transfer files from one device to another, or simply to increase the storage capacity of the phone.
Wi-Fi SDs are Wi-Fi communication devices on a special SD card inserted into the SD card slot. They can move pictures to a local computer or an online photo sharing service.
Additionally, many devices have USB On-The-Go and support USB storage, in most cases using either a special USB micro-B flash drive or an adapter for a standard USB port. Such adapters can also be used with various other USB devices, such as hardware mice and keyboards.
Chargers and external batteries
Cell phone chargers have gone through a diverse evolution that included cradles, plug-in cords and obscure connectors. However, more recent devices generally use micro-USB. (Apple devices still use proprietary cables, though the form-factor of their 30-pin plug used on older devices has shown up elsewhere.)
External batteries can be included in the case (power case). Also external batteries can include rubber suction.
Photo accessories
Smart lenses are larger and more capable than the phone's camera, having optical zoom and other features. They connect to the smartphone by Wi-Fi and an app. They are compatible with most smartphones. Smart flash can be used also for selfies.
Selfie stick
Selfie sticks are used to take selfies.
Smartphone tripod mount
Used to hold steadily the phone during the capture of a photo, video, time-lapse, etc, on a tripod or on a telescopic monopod (aka selfie stick).
HDMI and Projector
Micro USB to HDMI cables are used in smartphones with MHL.
Source of the article : Wikipedia
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