Specifications from the Samsung website:[1] In January 2007 Research In Motion, creators of the BlackBerry handhelds, filed suit in United States federal court claiming the BlackJack trademark was too similar to the BlackBerry mark.

[6] They alleged that Samsung had named their smartphone with a word beginning with "Black" just to mislead the customers that would come to the cellphone stores with the intention to purchase a BlackBerry.

A month later the two parties settled out of court.

[7] In January 2008, Rogers Wireless and Fido Solutions released the Blackjack II in Canada under the name Jack.

For handsets manufactured between November 2006 and February 2007, there is a known defect in the antenna assembly, causing a large number of dropped calls.