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After much fanfare there S4 was finally revealed and it seems more of an upgrade to the S3 itself but with the latest version of Android and a lot of Samsung software tweaks (some of which should be coming to the S3 as well), The S4 is bigger (screen-wise and feature wise) yet physically smaller and lighter when compared to the S3 (130g vs 133g).

Upgraded specs:

• Processor (new quad core / an octa-core vs dual core / older quad core - market dependent
• Screen (5” vs 4.8”)
• Cameras (13MP vs 8MP)
• Battery (2600mAh vs 2100mAh)

Specifications

• 5" (4.99”) Full HD Super AMOLED 1080p screen (1080x1920, 441ppi)
• Android 4.2.2
• 16 / 32 / 64 GB storage with microSD card slot
• 2GB RAM
• Similar dimensions to S3 but thinner narrower, lighter
• 13MP rear camera, 1080p video
• 2MP front camera, 720p video
• 2600mAh (removable)
• 3G & LTE (all LTE frequencies - global roaming)
• New/Notable features
  • 802.11ac (Typical WiFi, NFC)
  • IR LED for remote control functions
• Still has microSD & removable battery
• Extra Sensors: IR Gesture, Temperature, Humidity (in addition to Accelerometer, RGB light, Compass, Proximity, Gyro, Barometer)
• Available starting end of April and will be available in 155 Countries

Software Tweaks

• Dual Camera: uses rear and front photos & videos (front video can be toggled as an overlay during the video which recording)

• Sound & Shot: 5 seconds of audio before/after photo

• Drama Shot: composite multiple shots (over 100/ second - choose which ones to composite)

• Eraser: remove unwanted bits in the photo

• Cinema Photo: make cinegraphs

• Air view: hover over items to reveal more info (like stylus hover in Note II / mouse hover). Use front camera.

• S Translator: text to speech and speech to text

  • 9 langauges: English, French, German, Italian, Latin-Amera, Spanish, Chinese, Japanese, Korean, Brazilian Portugese
  • Offline support
  • Integrated into Samsung apps
  • Optical reader app -  so you can take a photo of signs and menus to translate them.

• Adapt Display: adjust brightness, saturation, contrast depending on what is being used

• Story Album: automatic photo album creation (e.g. uses location to detect holiday). In-app purchase of physical albums

• Samsung Home Sync support

  • Home Sync is a physical device with 1TB personal
  • Phone, TV, tablet, PC connectivity
  • NFC tap to connect

• S Voice Drive: S Voice with interface for driving

• Samsung Smart Switch: for migrating data from ‘any’ smartphone to the S4

• Glove support

• Samsung Hubs: video, book, games store

• Samsung Knox: separates work and personal space

• Group play: sync devices to play music together. Games support it.

• ChatOn

  • Dual Video Call: uses front and rear cameras for video chat
  • Screen share

• Air Gesture: navigate by swiping hand over camera: scrolling, previous/next photo (S3 had something like this)

• Smart Pause: pauses video when you look away and resumes when resume looking

• Smart Scroll: tilt device to scroll

• S Health: health monitoring

  • Keeps and tracks different data with the help of accessories

    • S band, Body Scale, Heart Rate Monitor

  • Tracks

    • Calorie Consumption / Burned

    • Sleep Pattern

    • Heart Rate

    • Exercise

    • Weight

    • Blood Sugar & Blood pressure

Accessories

• Pouch
• Flip Cover
• Protective Case
• S View Cover: transparent section to view things like caller ID

Links

• Samsung S4 microsite
• GSM Arena specs
• Comparison with other phones