The iPhone 5 may be creating waves post its Sept. 12 launch, but the smartphone's challenger, the Galaxy S3, is on track to give the Apple device some stiff competition. Recently, carrier T-Mobile USA announced that the Galaxy S3 was its best-selling device ever.

On Friday, Oct. 5, the carrier took to its Twitter account to make the announcement.

"Did you know the Samsung Galaxy S III is@TMobile's all-time best-selling device? RT if you love your device!" tweeted T-Mobile USA.

T-Mobile USA did not disclose any specific sales figures for the Galaxy S3; however, tech pundits opine that the flagship Samsung smartphone would have easily crossed the one million unit sales milestone for T-Mobile to make such an assertion.

Considering that the Galaxy S3 was launched earlier in May this year, the news comes as a pleasant surprise for Samsung enthusiasts.

The announcement from T-Mobile USA also coincides with the record profits Samsung has been notching up in recent months, which have largely been attributed to the success of its Galaxy line-up. The Galaxy S3's sales figures would also indicate that American consumers are partial to the NFC-enabled 4.8-inch smartphone. Earlier in July, the Galaxy S3 had breezed past the 10 million sales mark with ease.

Currently, the consumer market is inundated with a spate of powerful devices that pack in user friendly features. However, with Android-powered devices gaining in popularity and market share, it seems that the smartphone market leader Samsung is poised to maintain its supremacy, thwarting off competition from rivals like Apple, Nokia, LG, and HTC.

Additionally, according to a Samsung list, the Galaxy S3 is expected to get an update from the Android 4.0 Ice Cream Sandwich to the latest Android 4.1 Jelly Bean operating system. The list reveals the names of the carriers whose version of the S3 would be eligible for the Jelly Bean update, which include Sprint, AT&T, Verizon, T-Mobile, and U.S. Cellular. However, no information on when the update will be pushed out is currently available.

With the Jelly Bean update in the anvil, T-Mobile USA customers would be eagerly awaiting for the roll out to happen soon. The upgrade to Google's latest OS would notch up additional brownie points for T-Mobile's Galaxy S3 and give a fillip to the sales figures.