Samsung’s Galaxy S2, which is expected to reach the U.S. this month, has been released in more than 120 countries. The UK and South Korea were the first ones to receive the device.

Samsung, as of now, has become the biggest competitor for Apple iPhone 5 and iPad tablets and with its dual core processor and Super AMOLED display, it poses a major threat to iPhone’s popularity.

Here are the reason why iPhone 5 may suffer against Samsung Galaxy S2.

One of the main areas where Galaxy S2 overpowers the iPhone 5 is the security. Both Android and iOS have different security approaches. Although Apple takes care to prevent a virus from entering its apps by verifying them, the rest of the phone is semi-vulnerable. Android, however, does not check the apps and the apps are run in an isolated manner so as not to affect the system in the event of a virus attack. In reality, both the operating systems are vulnerable to viruses, but the Android has an antivirus app which iOS does not.

The Galaxy S2 has been built with Samsung’s own Exynos processor, previously known as Orion, which is a dual core processor based System on Chip (SoC) with a speed of 1.2 GHz. The processor is further backed by a Mali 400 GPU and 1 GB of RAM and is nearly equal to the processing power of a desktop. The improved version of the Samsung-made smartphone is set to feature a 1.5 GHz processor with 3D graphics support. The iPhone, on the other hand, will come with the iPad 2's processor and the possibility of a 1.2 GHz speed is highly doubtful.

One of the major drawbacks of the iPhone is the inability to support Flash. The Galaxy S2, however, supports Flash. The Galaxy S2, at the moment, is the only smartphone in the market which allows full HD video playback even inside Adobe Flash player.

Apple’s App Store is also in danger of losing out to the Android Market. With its improved quality and quantity over the past few years, it is expected to surpass the Android Market in the near future. The area where the Android Market excels over the App Store is the number of free apps available for download. It is easy to access the source of Android to better its quality. If any weaknesses are found in the open source community, they are quickly fixed. The same process cannot be applied to the iPhone 5 as its operating system is not open source.

Another area where Galaxy S2 is a class apart is the display quality. There is no display that matches the Super AMOLED Plus, which is the best available technology for mobile displays at the moment. Samsung is the only manufacturer of Super AMOLED Plus displays. The display, previously, has even helped Samsung Droid Charge to become one of the best-selling devices on Verizon, overtaking HTC Thunderbolt.

The AMOLED Plus display is known for delivering better color, improved readability, slimmer form and better battery consumption compared to the previous generation. The displays’ Real-Stripe panel technology brings about 30 percent more pixels per inch for a brighter, clearer and richer viewing experience than the first-generation AMOLED.

The other great feature about the displays is the incredible high resolution, natural colors and wide-angle visibility which is much better than iPhone’s retina display. Although the Phone 5 will just be an improved version, it still has a long way to go before it catches up the Super AMOLED Plus.

The Galaxy S2 currently supports 3G data speeds up to 21 Mbps (HSPA + networks). The future LTE version of the smartphone is set to feature HSPA up to 42 Mbps that will provide unimaginable speed and, clearly, this is another area where iPhone 5 won’t stand a chance. LTE compatibility for iPhone 5 is highly doubtful as that will contradict with Apple’s plan to deliver a slim smartphone.

The Galaxy S2 offers Bluetooth 3.0+HS transfer, Wifi Direct, Allshare (DLNA) and HDMI through MHL. iOS, however, doesn’t allow the user to transfer camera images via Bluetooth. Galaxy S2 is the only present device that lets you transfer files through highspeed true 3.0+HS standard Bluetooth.

Apple recently announced its new iOS 5 that will arrive along with the iPhone 5. Most of its new features like cloud synchronization, wireless syncing, notification bar, iMessage, Twitter integration and Widgets, however, are already found in Android. iMessage is an exception which has been mostly copied from BlackBerry. Android is more customizable, has more widgets and fewer restrictions. The OS also has a more fluid interface.

It is highly unlikely that the iPhone 5 will arrive with NFC (Near Field Communication) capability. The Galaxy S2, on the other hand, supports the NFC chip that allows for simplified transactions, data exchange and connections with a touch. Apple’s fifth generation iPhone, however, will have mobile payment accessibility and is expected to team up with PayPal for this. Apple needs to work on this fast if it hopes to stand any chance against the Galaxy S2.

The last, but definitely not the least, area of improvisation is Apple’s inability to provide extendable memory slot and removable battery. Galaxy S2 has the privilege of expandable memory and a removable battery. The RAM memory, which Apple never reveals beforehand, always turns out to be less than other phones. The Galaxy S2 has the advantage of 1 GB RAM over a dual core processor.