HTC struggled at release to deliver hardly any HTC One smartphones when it launched back in April. It struggled with inventory and other production issues.

However, despite the above problems and fierce competition from Samsung, it looks like it is on track to have sold 5 million phones by the end of May.

On top of that HTC has doubled production to keep up with demand which it is still struggling to meet.

With Samsung shipping 10 million S4’s, who will be left to buy the next iPhone?