: Many iterations of the deal required customers to also have or add AT&T Internet or TV service (like DIRECTV or U-verse) to receive the full "free" credit. Without these, the credit might be limited to 50% off.
: At least one of the two devices must be activated on a new wireless line . at&t buy one get one free deal
: Both devices typically must be from the same brand (e.g., two iPhones or two Samsung Galaxies). Strategic Evolution: BOGO vs. Trade-In : Many iterations of the deal required customers