Android Question PhoneEvents PhoneStateChanged IncomingNumber is empty

rp.CheckAndRequest("android.permission.READ_CALL_LOG")
    wait for Activity_PermissionResult(permission As String, result As Boolean)
    Log("READ_CALL_LOG: " & result)

dim howrings as int =2  'must be 2 or 3... at low specs devices... i use 3... 2 rings is very fast...
dim ring as int = 0
dim ph as string

...

Sub PE_PhoneStateChanged (State As String, IncomingNumber As String, Intent As Intent)

    ring=ring+1
    Log(ring)
    If ring<howrings Then
        Return
        Else
        ring=0
    End If
    Log("passing to check...")


    If State = "RINGING" Then
    ph=IncomingNumber.trim
    Log(ph)
    end if