Comparison

  • 9-key: big keys, fewer mis-taps, good for one hand and older users, more repeated candidates;
  • Full keyboard: matches the PC layout and suits English, better with two hands;
  • Many users enable adaptive layout so landscape switches automatically.
  • Settings

    1. Switch under Input Settings → Keyboard Layout;
    2. Enable one-handed mode (left or right) on large phones;
    3. Haptics and sounds improve feedback but use more battery.