The Samsung Galaxy S4 launch is just over a week away but the firm faces some tough competition from rivals on the market. The chief challengers are the HTC One and the Apple iPhone 5.
The HTC One was unveiled in February and is currently the top Android handset on the market featuring a number of custom camera and software innovations that make it entirely unique and original.
Meanwhile the iPhone 5 is Apple's current flagship smartphone. Released late last year, despite being midway through its product life cycle, the device is still viewed as the benchmark by which many people judge and compare any new smartphone.
No doubt has some impressive tricks up its sleeve for the next iPhone - whether that's the iPhone 5S or iPhone 6 - but for now it remains a top contender that Samsung, and HTC, will be measured against.
As such, our head to head review between the HTC One and iPhone help show not only what Samsung's S4 will have to compete with but also how these heavyweights square off against one another.