Samsung Galaxy S 2

Can the Samsung Galaxy S II compete against the iPhone 4S?
Samsung Galaxy S 2
Primary Camera:

The Samsung Galaxy S II and the iPhone 4S can shoot HD videos of up to 1080p.
Samsung Galaxy S 2
Secondary Camera:

The iPhone 4S is equipped with VGA front-facing camera while the Samsung Galaxy S II is sporting 2-megapixel secondary camera. The Samsung Galaxy S II supports MicroSD card slot, so with the 16GB model only, a user can upgrade the phone’s storage to 48GB. Meanwhile, Apple is offering three iPhone 4S models, 16GB, 32GB and 64GB. The iPhone 4S doesn’t support MicroSD card slot.
Samsung Galaxy S 2
According to Apple, the iPhone 4S supports up to 14.4Mbps download, and 5.8Mbps up, while the Samsung Galaxy S2 is an HSPA+ ready phone with 21Mbps download speed and 5.76Mbps upload. The iPhone 4S is a CDMA/GSM phone or a world phone, while Samsung is offering GSM and CDMA Galaxy S II.
Samsung Galaxy S 2
The iPhone 4S sports 3.5-inch screen, with the Retina Display or 960 x 640 pixel resolution at 326 ppi, while the Samsung Galaxy S II boasts 4.3-inch (4.52 for the Sprint Epic 4G Touch and T-Mobile USA’s Galaxy S II) Super AMOLED Plus screen technology. Samsung Galaxy S II’s screen sports 217 ppi (for the 4.3-inch screen and 206 ppi for the 4.52-inch screen) with the resolution of 480 x 800. Connectors, buttons etc:
Samsung Galaxy S 2
The Samsung Galaxy S II and the iPhone 4S also have on and off button for the phones’ sleep or wake mode.

Talk Time, internet time, battery life:

Price:

The Samsung Galaxy S II 16GB model sports the tag price of $199.99 (AT&T, Sprint), while the iPhone 4S with 16GB will use the same tag price of $199.99. 32GB Samsung Galaxy S II is not yet available in United States.
Samsung issued a statement on its blog about the flaw.

Finally after a very long wait Samsung Galaxy S2 on AT&T is out. Samsung Galaxy S2 has appeared in stores in the US after a very long wait.

Source :
http://popherald.com/samsung-galaxy-s2-vs-iphone-4s-specs-features-price-comparison/news/2011/10/04
http://nvonews.com/2011/10/05/samsung-galaxy-s2-on-att-is-there-a-security-issue/
http://global.christianpost.com/news/samsung-galaxy-s2-release-date-att-device-has-serious-security-flaw-video-57070/