[Roko_foko]

pawn Код:

//after the animation
SetTimerEx("CellphoneDisapear", DISAPPEAR_TIME, false, "d", playerid);

//on top of the script 
forward public CellphoneDisappear(playerid);

// where ever you want :D

public CellphoneDisappear(playerid)
{
    RemovePlayerAttachedObject(playerid, 4);
    return 1;//don't know if this is necessary
}

DISAPPEAR _TIME- you will need to count that(1000=1 sec). Check how long does the animation last( if the animation lasts for 3.5 sec you should put 3500).