Applied model:

1. Americas: IFP**50 - Gen 1, IFP**50 - Gen 2, IFP**50 - Gen 3, IFP70.

2. Asia Pacific & Africa: IFP**50, IFP**50-2, IFP**50-3, IFP70.

3. Europe: IFP**50, IFP**50-2EP, IFP**50-3EP, IFP70.

You can press front control button “SETTING” “VOL+” “VOL-“ “VOL+” “VOL-“ in sequence to unlock.