| Problem | Solution | |---------|----------| | “Code already used” | Contact Cambridge support – codes are one-time only. | | ZIP won’t extract | Download again – file may be corrupted. Use 7-Zip (Windows) or Unarchiver (Mac). | | No sound on phone | Check media volume, not just ringtone. Try a different MP3 player app (e.g., VLC). | | Missing units | The audio covers Units 1–116 + appendices. If files are missing, redownload. |
: Ensure you have a CD player or a computer with a CD drive. If you're using a computer, make sure it has media player software capable of playing audio CDs. basic grammar in use 4th audio install