<Tr> <Td> if not answered </Td> <Td> * 61 * (phone number) #</Td> <Td> #61 #</Td> <Td> #61 #</Td> <Td> * #61 #</Td> <Td> * 61 #</Td> </Tr> <P> For GSM / 3GSM (UMTS) phones, the GSM standard defines the following forwarding Unstructured Supplementary Service Data . These were developed by ETSI and are based on standard European diversion codes and are similar to those used on most landlines in the EU: </P> <Table> <Tr> <Th> Forward service </Th> <Th> Activate </Th> <Th> Cancel & Deregister </Th> <Th> Cancel & Retain </Th> <Th> Status </Th> <Th> Reestablish </Th> </Tr> <Tr> <Td_colspan="6"> Unconditional forwarding: </Td> </Tr> <Tr> <Td> all calls </Td> <Td> * 21 * (phone number) #</Td> <Td> ##21 #</Td> <Td> #21 #</Td> <Td> * #21 #</Td> <Td> * 21 #</Td> </Tr> <Tr> <Td_colspan="6"> Conditional forwarding: </Td> </Tr> <Tr> <Td> if busy </Td> <Td> * 67 * (phone number) #</Td> <Td> ##67 #</Td> <Td> #67 #</Td> <Td> * #67 #</Td> <Td> * 67 #</Td> </Tr> <Tr> <Td> if not answered </Td> <Td> * 61 * (phone number) #</Td> <Td> ##61 #</Td> <Td> #61 #</Td> <Td> * #61 #(incl . time delay) </Td> <Td> * 61 #</Td> </Tr> <Tr> <Td> if out of reach </Td> <Td> * 62 * (phone number) #</Td> <Td> ##62 #</Td> <Td> #62 #</Td> <Td> * #62 #</Td> <Td> * 62 #</Td> </Tr> <Tr> <Td> all forwards </Td> <Td> * 002 * (phone number) #</Td> <Td> ##002 #</Td> <Td> #002 #</Td> <Td> * #002 #</Td> <Td> * 002 #</Td> </Tr> <Tr> <Td> all conditional forwards </Td> <Td> * 004 * (phone number) #</Td> <Td> ##004 #</Td> <Td> #004 #</Td> <Td> * #004 #</Td> <Td> * 004 #</Td> </Tr> </Table> <Tr> <Th> Forward service </Th> <Th> Activate </Th> <Th> Cancel & Deregister </Th> <Th> Cancel & Retain </Th> <Th> Status </Th> <Th> Reestablish </Th> </Tr>

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