iPhone 4G

While Apple may tinker with the final packaging and design of the final phone, it's clear that the features in this lost-and-found next-generation iPhone are drastically new and drastically different from what came before. Here's the detailed list of our findings:

What's new

• Front-facing video chat camera
• Improved regular back-camera (the lens is quite noticeably larger than the iPhone 3GS)
• Camera flash
• Micro-SIM instead of standard SIM (like the iPad)
• Improved display. It's unclear if it's the 960x640 display thrown around before—it certainly looks like it, with the "Connect to iTunes" screen displaying much higher resolution than on a 3GS.
• What looks to be a secondary mic for noise cancellation, at the top, next to the headphone jack
• Split buttons for volume
• Power, mute, and volume buttons are all metallic

http://gizmodo.com/5520164/this-is-apples-next-iphone

Apple iPad (Apple A4 processor 1.0GHz)

When Apple dropped the Newton line of palm-computing devices in the late '90s, many people were severely disappointed. The project was abandoned by Apple, but die-hard Newton fans hunkered down and kept the systems going for years afterward. To give credit to Apple, the Newton MessagePad was designed well enough so that even today it is still considered a viable option by some people. Through Apple's ups and downs, there has been speculation on whether or not Apple would revive the Newton, and while recently it has been clear Apple's Newton days are over, the hope for the company to return to palm and tablet computing devices had not faded.

To read more - http://reviews.cnet.com/8301-13727_7-10442722-263.html

Android (Google Phone)

Nexus One Google has gotten into the phone market with their first Google-branded Android smartphone. The hardware is actually made by HTC, but the software and user experience are pure Google. This is the first Android phone to run OS 2.1, and will likely be the first to get updates in the future. Google calls this the "super phone" since it has very high end specs like a 1GHz Snapdragon CPU that flies, a 3.7" capacitive AMOLED touch screen, 512 megs of RAM, a 5 megapixel autofocus camera, GPS, WiFi and Bluetooth. It's sold unlocked directly by Google and you can get it in the US for retail or heavily subsidized with a T-Mobile contact. Is it the best phone ever? Read our review to find out.

BlackBerry Curve 8520

BlackBerry Curve 8520 RIM evolves their BlackBerry hardware slowly-- with millions of Crackberry addicts, they don't want to mess with a good thing. And we have to say their trackpad that replaces the beloved BlackBerry trackball is simply amazing. Likewise, the top media playback controls are cool and useful. Beyond those, the Curve 8520 is a basic 'Berry for T-Mobile with EDGE, UMA calling over WiFi, a QVGA display and a 2 megapixel camera.

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To read the complete reviews of all the smartphones - Click Here