E-retailer Amazon comes up with great bargains for Android-based smartphones quite frequently. Now, the retailer is offering the AT&T variant of the best-selling Samsung Galaxy S3 for just $79.99 in the U.S.

The offer from Amazon is for AT&T's Galaxy S3 on a two-year contract and is only valid for new customers. This discounted deal is ideal for consumers who are already are looking for a new high-end smartphone on AT&T. Additionally, existing users who wish to upgrade their contract will have to shell out $99.99 to avail the offer.

Amazon is offering the 16GB variant of the Galaxy S3 for $79.99 in several colors - Marble White, Garnet Red, and Pebble Blue. The white model is currently out of stock on Amazon and the site disclaims "this item is no longer available." However, the blue version is in stock and to purchase the blue model, those interested can check here. Consumers can also check out the Garnet Red version here.

This AT&T deal on Amazon is presently the cheapest rate available for the carrier's Galaxy S3 variant. The same phone is sold for $199.99 on a two-year contract via AT&T stores.

Additionally, Amazon also has the Sprint variant of the Galaxy S3 up for grabs for just $0.01 in both white and blue. The Verizon variant of the Galaxy S3 will set users back by $59.99 and is available in white and blue colors as well.

With plenty of deals on the Galaxy S3 thanks to Amazon, which carrier would you opt for?