Consumers have had months to make a move on buy one get one (BOGO) deals on Samsung's latest flagship phone, they have been offered such opportunities from major U.S. carriers, but AT&T has fattened its offering of eligible phones.

Alas, the hour is late and AT&T's months-long BOGO offer is set to expire in just a few days.

The latest battle of the BOGOs started in March, when AT&T and T-Mobile pit their Samsung Galaxy S7 offers against each other. That campaign came on the heels of a set of February deals, in which the Galaxy S6 was on offer.

Shoppers have until June 30 to act on BOGOs AT&T is offering on the Samsung Galaxy S7, Galaxy S7 Active, Galaxy S7 Edge, Galaxy S6, Galaxy S6 Edge, Galaxy S6 Edge+, Galaxy S6 Active, Galaxy Note 5, HTC One A9, LG G5, Kyocera DuraForce and Microsoft Lumia 950.

To take advantage of one of the dwindling deals, which is available to both new and existing AT&T customers, consumers will need to choose two qualifying handsets from the same manufacturer and will have to select an AT&T Next payment plan.

At least one of the two phones will need to be activated on a new line of service and the second handset will have to be picked up on an AT&T Next24 plan.

With the first phone configured for a Next plan, shoppers will then need to select the "Save & Add Another Device" option to add the "free" phone.

"Keep both Galaxy devices and remain active and in good standing, and you should begin to receive your credit within 3 billing cycles," says AT&T.

Along with the BOGO, AT&T has also been offering shoppers up to $650 in line credits to abandon their previous carriers to join the company's network. To qualify for that offer, consumers will need to trade in eligible smartphones and pick up a new handset on an AT&T Next payment plan.

And on top of all that, AT&T is still running its synergistic data offer for customers who have wireless service with the carrier and one of its pay TV services. For those who meet those requirements, AT&T is giving them unlimited data.

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