Not just a phone, Asus has unveiled an entire range. That range being the Asus Zenfone. The name might suggest a phone that brings some kind of peace and tranquility to your life, but unless there's an app for that, it doesn't seem to be the case.Instead, you get colourful and affordable handsets from 4 through to 6 inches running Android 4.3, although Asus has confirmed that all will be unveiled to Android 4.4 (KitKat). Presumably before the phones hit the retail shelves.Starting at the top is the biggest and most powerful of the trio, the Asus ZenFone 6. That packs a 6-inch 1280 x 720 IPS display, along with a 2GHz Intel Atom Z2580 processor, 1GB RAM, a 13-megapixel rear camera, 2-megapixel front facing camera and a strong 3230mAh battery. All of that in a phone around 9.5mm thick and weighing 200g.Drop down a notch and you'll find the Asus ZenFone 5 with a 5-inch 1280 x 720 display, also featuring an 8-megapixel rear camera and 2050mAh battery. A little thicker at 10.3mm but less weight at 144g. Finally, you can opt for the cheapie of the bunch, the Asus ZenFone 4 with 4-inch 800 x 480 resolution screen, 1.2GHz Intel Atom Z2520 processor at 1.2GHz, 1GB RAM, 5-megapixel rear camera, 0.3-megapixel front camera and 1170mAh battery. That is around 11.2mm thick and will weigh 115g in your pocket.No details of that all-important shelf date, but the pricing is certainly tempting. At least it is if we get the same pricing as the US. The Asus ZenFone 4 will retail for $99 (just £60), with the ZenFone 5 coming in at $149 (£80) and the ZenFone 6 the priciest of the bunch at $199 (£100).If the Asus ZenFone 6 can come in at £100 in the UK, it should go down a storm.