I have found it difficult to use the default Frenzy SIP keyboard layout as the keys are too small to press accurately. The attached BigKey keyboard (std app on Google Play) has larger keys which make text and numeric entry much easier on the small screen of the WT - may be interesting to see if this type of keyboard could be licenced and pre-installed on the device ?

Note that the attached StageNow code can be used to install this keyboard from any device connected to the internet i.e will download and install the APK and set this keyboard as the default input method.

Bigkey Keyboard                                                                           Default WT Keyboard