Samsung will unveil the Galaxy S7 and S7 edge smartphones at an event tomorrow. Now the specifications of the smartphone have been detailed in a Samsung Pay promotional poster from a Spanish bank La Caixa. Sammobile who got hold of this poster, also reveals that both the smartphones will come with a 12MP rear camera with 1/2.5-inch sensor, at least 1.4-microns, 8-megapixel front-facing camera and powerful 1.5W loudspeaker.