Size of the keypad of the MIK™ prototype shown below is 42x42 mm. This particular size was mostly defined by form-factor of the available touchpad, so that positioning of the keypad in the prototype would be similar to positioning of the keypad in the real mobile phone. Actually, size of the MIK™ can be significantly smaller (e.g. 30x30 mm), providing at the same time low error rate and high input speed.

The screenshot of the MIK Explorer (s/w used with the MIK™ prototype) is shown below. The real-life traces of the thumb movements (white circles) can be seen in the right part of the screenshot. Directions of the thumb movements are shown by the yellow arrows, the input word is "MIK" (can be seen in the text field in the left part of the screenshot). One can notice that the thumb's movements shouldn't start precisely in the center of the key, actually, they can start anywhere on the key. That's ergonomically easy. Again, the MIK™ is a straightforward, intuitively clear approach with 100% legacy support at the same time, what makes it ideal for the purpose and the working prototype proves this.

The MIK™ prototype as seen from outside and inside is shown below. Cirque's GlidePoint touchpad's back side can be seen on the right image. 

More detailed front view of the MIK™ prototype:

It could be interesting to the German-speaking Readers to know that the MIK™  allows straightforward inputting of the German letters with umlaut. Fortunately, the keys of standard telephone keypad with letters A, O, and U have an unused space (or directions in terms of the multi-directional input) on them, what can be used for input of the German letters with umlaut. Actually, this approach has been already realized in the working prototype of the MIK™. German layout of the MIK™ is shown on the picture below. Similar approach can be used for other European languages.