[masraum]

Sorry, not that the 6 won't do landscape, but that the 6 plus has some tweaks to make it more landscape friendly.

iPhone 6 vs. iPhone 6 Plus: A closer look

Fortunately Apple (apparently) recognized this, and emphasized landscape mode on the iPhone 6 Plus, which we find to feel more natural in hand (just grip each side of the 158 mm long phablet). For the first time on an iPhone, the Plus' home screen will rotate for horizontal use, and its Mail app shows two columns in landscape (one for list view, another for message view). Safari even shows your landscape browser tabs the way it does on an iPad (basically desktop-style). You won't get any of this on the smaller iPhone 6.

Landscape mode is where the iPhone 6 Plus can become less of a big iPhone and more of an iPad mini-mini.

Third-party developers have picked up on this landscape focus pretty well. Standards like Flipboard, Amazon and eBay are (annoyingly) still limited to portrait-only, but you will find App Store fare like Newsify, Pocket and Microsoft Outlook (among many others) that do rotate into landscape.

The latter group helps to make the iPhone 6 Plus your one device to rule them all pocket computer. But that continuity is broken a bit when you go back to those portrait-only apps.