Aug 23, 2011 09:27 GMT  ·  By

North American smartphone market has seen an incredible expansion in the last few years. The reason behind this development is Google's Android sudden ascension, there's no doubt about it

However, it will be interesting to see how well some of the Android devices built by various manufacturers fared against Apple's iPhone 4 smartphone in the last quarter.

According to NPD Group research company, the best selling Android handset in Q2 2011 was the HTC EVO 4G, but the device is only third as the preferred smartphone in United States during the same period.

Surprising or not, Apple's iPhone 4 is still on top as the best selling smartphone in United States in Q2, while the iPhone 3GS comes second.

HTC's Inspire 4G came second as the best selling Android smartphone, but is only fourth in the overall hierarchy.

It looks like Apple's policy to launch different variants of its iPhone smartphone boosted its sales.

Making the phone available via multiple carriers and introducing a white flavor of the iPhone 4 squeezed a lot of money from consumers.

While Apple's iPhone 4 number 1 spot may not be such a surprise, it is interesting to see two of HTC's high-end Android phone battle for supremacy.

The HTC EVO 4G is now available for purchase from Sprint, which is the third largest carrier in the United States, while the Inspire 4G owes its number 4 spot to Best Mobile, which retailed the smartphone for as low as $49.99.

It is also worth mentioning that only one of the four smartphones was launched this year, the HTC Inspire 4G, while the iPhone 4 and HTC EVO 4G were introduced last year.

Despite Apple's domination in the United States, it will be interesting to see what will happen once Microsoft and Nokia launch their first Windows Phone Mango smartphones in early 2012.

Windows Phone will probably take its market share from both Apple and Android in 2012, but Google's platform will probably lose more in case the Microsoft-Nokia joint-venture is successful.