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How To Exchange Data Using Nfc

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How to setup the NFC (Near Field Communication on my Nexus S?
What is it used used for, other than credit card payment, and how safe is it?

NFC (Near Field Communication) is short-range wireless technology based on RFID that is being adopted in mobiles devices and windows desktop computers to facilitate data exchange by touching two NFC-enabled objects together. NFC will be able to help people connect with information, websites, check in with social media applications (Foursquare, etc) and make payments. There are numerous different NFC products such as tags, stickers, cards, wristbands, key chains, and readers. Each of these devices can be programmed to go to websites, share contact information, check in, start and stop pay clocks, unlock doors, and much more. Merchants and businesses can purchase these tags now from a variety of website to begin using. Finally NFC is very safe. NFC payments will be more secure than our current credit card system. For example the security codes on debit and credit cards are currently static numbers which can be easily forged. NFC payment will have dynamically changing security codes to reduce bank theft and credit card fraud.

What do you mean by NFC in Mobile phones?
what are its uses??what do you mean by nfc tags..will it be usefull in india?

NFC means Near Field Communication. NFC Technology is being implemented on many phones nowadays, even though its uses aren't very prevalent. Many Blackberrys have NFC technology. Let's say you're in a movie theatre- if you have a phone that has NFC technology, and you happen to walk by a poster that has an NFC tag, if you swipe your phone over that poster, your phone will automatically open the website for that movie, or it will open Fandango or Flixter to show you show times or reviews. It's a pretty sweet feature, it's just that not a lot of things are NFC compatible yet. It's a form of data transmission that is done through radio communication, so all you have to do is touch the two things (your phone and a poster) or bring them next to each other for it to work. Also, NFC can be used to transfer info from one phone to another- or to make payments. Wikipedia lists these uses : 1. Matching encrypted security code and transporting access key; 2. Instant payments and coupon delivery using your handset, as we do with your credit card or debit card; 3. Exchange of information such as schedules, maps, business card and coupon delivery in a few hundred milliseconds; 4. Pay for items just by waving your phone over the NFC capable devices 5. Transferring images, posters for displaying and printing Hopefully we'll see more of it in the future. :) EDIT: In India, it will be useful but in later years. It's barely seen in the US now, so I can imagine that it will take some time.

What do you get with a better droid os?
like say 2.2 to 4.0? ok whats like the best improvements? trying to figure out if its worth the extra 100$ or so

Verizon - 4.0.1...released October 19, 2011: Soft buttons from Android 3.x are now available for use on phones Separation of widgets in a new tab, listed in a similar manner to apps Easier-to-create folders, with a drag-and-drop style A customizable launcher Improved visual voicemail with the ability to speed up or slow down voicemail messages Pinch-to-zoom functionality in the calendar Integrated screenshot capture (accomplished by holding down the Power and Volume-Down buttons) Improved error correction on the keyboard Ability to access apps directly from lock screen Improved copy and paste functionality Better voice integration and continuous, real-time speech to text dictation Face Unlock, a feature that allows users to unlock handsets using facial recognition software New tabbed web browser, allowing up to 16 tabs Automatic syncing of browser with users' Chrome bookmarks A new typeface family for the UI, Roboto Data Usage section in settings that lets users set warnings when they approach a certain usage limit, and disable data use when the limit is exceeded Ability to shut down apps that are using data in the background Improved camera app with zero shutter lag, time lapse settings, panorama mode, and the ability to zoom while recording Built-in photo editor New gallery layout, organized by location and person Refreshed "People" app with social network integration, status updates and hi-res images Android Beam, a near-field communication feature allowing the rapid short-range exchange of web bookmarks, contact info, directions, YouTube videos and other data Support for the WebP image format[49] Hardware acceleration of the UI[60] Wi-Fi Direct[61] 1080p video recording for stock Android devices Android VPN Framework (AVF), and TUN (but not TAP) kernel module. Prior to 4.0, VPN software required rooted Android. Version 4.0.2released November 28, 2011 Fixed minor bugs on the Verizon Galaxy Nexus, the US launch of which was later delayed until December 2011 (For Canadian consumers, 4.0.2 reportedly created a bug on the Galaxy Nexus that crashed the application market when users attempted to view details of any Android application. It also inadvertently reduced the NFC capabilities of the Nexus phone).[62][63] Version 4.0.3released December 16, 2011[64] Numerous bug fixes and optimizations Improvements to graphics, databases, spell-checking and Bluetooth functionality New APIs for developers, including a social stream API in the Contacts provider Calendar provider enhancements New camera apps enhancing video stabilization and QVGA resolution Accessibility refinements such as improved content access for screen readers[65] Version 4.0.4released March 29, 2012[66] Stability improvements Better camera performance Smoother screen rotation Improved phone number recognition[67 WAIT, paying 100 bucks? the update should be FREE! as you have a phone that can support the update: HTC Droid Incredible 2 (Verizon) HTC EVO Design 4G (Sprint) HTC EVO 3D (Sprint) HTC Rezound (Verizon) HTC Rhyme (Verizon) HTC Sensation 4G (T-Mobile) HTC Thunderbolt (Verizon) LG Lucid (Verizon) LG Spectrum (Verizon) Motorola Atrix 4G (AT&T) Motorola Atrix 2 (AT&T) Motorola Droid Razr (Verizon) Motorola Droid Razr Maxx (Verizon) Motorola Droid 4 (Verizon) Motorola Droid Bionic (Verizon) Motorola Photon 4G (Sprint) Samsung Captivate Glide (AT&T) Samsung Galaxy Note (AT&T) Samsung Galaxy S II Skyrocket (AT&T) Samsung Galaxy S II (AT&T, T-Mobile) Samsung Galaxy S II Epic 4G Touch (Sprint) Samsung Galaxy S Blaze 4G (T-Mobile) Sony Xperia Play 4G (AT&T, Verizon) HTC One S (T-Mobile) HTC One X (AT&T) HTC EVO 4G LTE (Sprint) HTC Vivid (AT&T) HTC Amaze 4G (T-Mobile) HTC Sensation 4G (T-Mobile) Samsung Galaxy Nexus (Verizon, Sprint) Samsung Nexus S 4G (AT&T, Sprint)

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