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  1. iPhone
  2. Android
  3. BlackBerry
  4. Windows Phone
  5. Windows Mobile
  6. bada
  7. Brew MP
  8. Symbian OS
  9. MeeGo
  1. AT&T
  2. Verizon Wireless
  3. Sprint
  4. T-Mobile
  5. U.S. Cellular
  6. Virgin Mobile
  7. Rogers Wireless
  8. Cricket Wireless
  9. Orange
  10. MetroPCS
  11. Telus Mobility
  12. Boost Mobile
  13. Bell Mobility
  14. Vodafone
  15. Alltel
  1. Price
  2. Keyboard
  3. Thin
  4. Lightweight
  5. Small
  6. Numeric keypad
  7. Waterproof
  1. Large
  2. High-ppi
  3. Touch
  4. High-res
  5. OLED
  1. High-res camera
  2. HD Video
  3. Front camera
  4. Camera flash
  5. HDMI Out
  1. Headphone jack
  2. FM Radio
  3. FM Transmitter
  1. High capacity
  2. Long talk time
  3. Long standby time
  4. Removable
  1. Wifi hotspot
  2. 4G
  3. NFC
  4. Fast wifi
  5. Fast download
  6. Low latency
  1. Fast processor
  2. Dual core
  3. Lots of RAM
  1. Samsung
  2. LG
  3. HTC
  4. Motorola
  5. Sony
  6. Nokia
  7. ZTE
  8. Huawei
  9. BLU
  10. RIM
  11. Pantech
  12. Alcatel
  13. Acer
  14. T-Mobile
  15. Spice Mobile
  16. Amoi
  17. Micromax
  18. BlackBerry
  19. Kyocera
  20. ICEMOBILE
  21. Panasonic
  22. GIGABYTE
  23. Asus
  24. Apple
  1. GPS
  2. Accelerometer
  3. Gyroscope
  4. Compass
  1. Fast web browser
  2. Adobe flash
  3. Multitasking
  1. Internal
  2. Micro SD
  3. Micro SDHC