With Apple recently claiming the No. 1 spot as the top smartphone vendor, Samsung will look to dethrone its rival after coming in as a close second. The showdown between the iPhone 5 and Samsung's Galaxy S2 will take place this fall as the two tech giants battle for smartphone supremacy.

Samsung's Galaxy S2 has rocketed into the market with rapid sales and high-end performance. The impressive part is that the smartphone has already sold over 3 million devices without entry in the U.S. market. With its upcoming launch in China and its U.S. debut scheduled for September, the Galaxy S2 could put Apple's top rank at risk.

To add more concern for Apple, Google's Android mobile OS has claimed a 39 percent share in the U.S. smartphone market compared with Apple's 28 percent, according to Nielsen. Combined with a red-hot Samsung lineup of Galaxy devices, it will give the South Korean tech company a boost towards the No. 1 spot.

However, Apple expects to fight back with the most anticipated smartphone release of 2011, the iPhone 5. A third of U.S. consumers are already planning to purchase the device, even without knowing its full specs.

Another survey by ChangeWave reports that 48 percent of the respondents say that if they are going to buy a smartphone in the next 90 days, it will be an iPhone. The iPhone 5 will no doubt attract buyers being the highest demanded smartphone on the market. But will that be enough to slow down Samsung's momentum?

Check out the matchup between Apple's iPhone 5 and Samsung's Galaxy S2 to see which device could propel their company to the top of the smartphone foodchain.

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