It may not be the Galaxy S4 but Samsung's former flagship, the Galaxy S3, packs enough power even for the advance Android users and it is cheaper now, going for as low as $10 on U.S. carrier Sprint.

The offer is open for customers willing to try out their first Sprint experience while those with existing contract can still opt to get second line with the S3 as their gadget of choice. They need to pay upfront $US100.

Sprint, it appears, is carrying the most attractive Galaxy S3 package at the moment, followed by Verizon, which dangles the popular Samsung handset for $US20 with contract. No doubt the tag and the terms are definite lures for gadget shoppers on the prowl for their much-awaited upgrade.

Old Verizon subscribers will have to pay a little more if they want to be part of the Galaxy S3 circle, which by the last count has more than exceeded the 40 million mark. The cash setback is not that much though - a mere $US50 one-off payment.

Over at AT&T, the top-notch Android mobile phone sells for $US80 with lock-in, coming out as the most expensive among the offers put together by the American network providers in their efforts to woo fresh clients.

The number one U.S. carrier also offers the Galaxy S3 to current AT&T customers for $US100. Or if buyers were wary of having to worry monthly payments for the next two years, the same handset can be had, also on AT&T but on pre-pay arrangement, for only $US450.

T-Mobile, on the other hand, has packaged the S3 for a two-year plan that requires a monthly obligation of $US20 with a one-time plunk down of $US70.

These offers reflect joint efforts by Samsung and its distributing partners to keep consumers' interest on outgoing flagships that the S3 will become by the end of April, the same time that its replacement, the Galaxy S4, will begin hitting stores shelves around the world.

Despite the prospect of becoming a generation-old, the Galaxy S3 remains a compelling buy for many following earlier indications from Samsung that it plans to enhance the current menu being served by the handset.

Blog reports have suggested that the S3 will get improved screen display, higher battery rating, wireless charging and possible dual-SIM capability in select markets, gaining much of the tweaks that Samsung normally affords to its old handset models.

Another upcoming S3 attraction is Samsung's pledge that most of the new features showcased during the March 14 Galaxy S4 launch will be extended to Galaxy smartphones with compatible hardware specs.

That declaration gave a strong hint that eye-tracking and motion-based scrolling will soon come to handsets like the Galaxy Note 2 and the Galaxy S3.