Many people ask how to change inpage keyboard to phone keyboard which i also wont know but now i been able to find how to do that actually phone keyboard is still difficult but some words become easy so above it a phonetic keyboard of Urdu.
first open inpage on left above corner click EDIT then pop down menu click PREFERENCES pop up right in last option you ill find KEYBOARD PREFERENCES click it windows will open in that window you will see pop down with multiple keyboard so select the phonetic keyboard and press oknow you have it ... best of luck