Many questioned whether Sony was really committed to Mozilla’s Firefox OS this week when the company announced it had “an ambition” to launch its first Firefox OS smartphones in 2014. But to prove it is getting behind the new platform, the Japanese company has released an experimental Firefox OS ROM for the Xperia E, which anyone can download and install on their device — providing they have the know-how.

Sony unveiled its latest Xperia smartphone today, and it’s sure to grab the attention of those juggling two devices for business and personal use. It’s called the Xperia E, and its special feature is that it’s available with a dual-SIM slot, allowing you to use two SIM cards and two different numbers at the touch of a button.