Following Best Buy's Memorial Day sale where it allowed customers to trade in any working smartphone to purchase an iPhone 5s 16GB for free, the electronics chain is continuing deals. For instance, the iPhone 5s 16GB is selling for $99.99 when users agree to a new two-year contract on AT&T (trade in a working older model iPhone to get the upgraded device essentially for free). Best Buy is also selling the larger gigabyte iPhones roughly $100 cheaper than at-retail price (when agreeing to new two-year contracts via AT&T, Verizon or Sprint).

Retailers are ramping up their trade-in deals as Apple is rumored to be launching the next generation iPhone as early as August. Best Buy said last month that absent any major product launches in consumer electronics and mobile phones its comparable sales will be negative for its fiscal second and third quarters.

Not to be forgotten, T-Mobile (TMUS) is offering $100 off select popular tablets for Father's Day and graduation, including the new Samsung Galaxy Note 10.1-2014 Edition, available today at participating T-Mobile stores. For a limited time, T-Mobile is promoting the tablet for $0 down (plus 24 monthly payments of $25 on T-Mobile's Equipment Installment Plan). T-Mobile is also bringing Alcatel OneTouch Pop 7 - an Android tablet with 7" display selling for just $168.

T-Mobile is promoting its Tablet Freedom program, where all tablets can get up to 200 MB of free high-speed data for life, and through the end of 2014, customers can get nearly 1.2 GB of free 4G LTE data every month through T-Mobile.

"We've more than quadrupled our tablet line-up over the last year, and we're just getting started," said Mike Sievert, Chief Marketing Officer for T-Mobile. "Go to any of the old carriers, and you could pay more for your tablet or get stuck with long-term service contracts and overages. Only T-Mobile gives you a selection of the latest iOS and Android tablets with no annual service contract, no limits while on our network, no overages, with the world as your network in 100+ countries at no extra cost- and 200 MB free data for life."

--Written by Laurie Kulikowski in New York.

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Disclosure: TheStreet's editorial policy prohibits staff editors, reporters and analysts from holding positions in any individual stocks.

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