The Customer Care Centre will send a temporary unit to replace yours until the fault has been fixed and the telephone returned to you. If a replacement telephone is sent to you, ensure that you remove the SIM card from your own telephone and place into the loan telephone. Similarly, remember to put it back when your telephone is returned. Telstra will suspend the operation of your mobile from that time on to stop unauthorised usage. Also contact the Pabx Manager on extn 4666.
Battery life depends on the way the battery is treated.
ALL batteries should be completely discharged before recharging. The simplest way to do this is to leave the mobile switched on until the battery runs out of power. Some desktop chargers do have a discharge facility. Batteries can be restored, although not quite to their original specifications. There is a local company that provide a pickup and delivery service and they are able to test the battery and advise whether it is repairable or not.