If recent history is any indication, Apple (AAPL -1.22%) will unveil its next iPhone in September. The iPhone 6S is expected to resemble its predecessor, but sport improved internals, a better camera, and additional features, most notably Force Touch.

Apple's next smartphone, however, will have to contend with a wave of competition. In recent weeks, Google's (GOOG -1.10%) (GOOGL -1.23%) Android partners have unveiled several new handsets, and more could be on the way. The following slideshow offers a rundown of the various smartphones that should compete with the iPhone 6S, including devices from Samsung (NASDAQOTH: SSNLF), HTC (NASDAQOTH: HTCXF), LG (NASDAQOTH: LGEAF) and BlackBerry (BB -1.43%).

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These Are The New Android Phones That Could Challenge Apple's iPhone 6S This Fall from The Motley Fool