This is one of the most common difficulties faced by people who are hard of hearing.
If you are a Telstra customer you are eligible for the Telstra Disability Equipment Program (external link). The program provides 3 different telephones that have the facility to increase volume and are compatable with hearing aids users.

Hearing easily on the telephone can become difficult with a hearing loss. Hearing aids fitted with a telecoil will give you the widest range of possibilities.
There is a variety of mobile phone accessories that are hearing aid compatible and will enhance your mobile phone use. Your hearing aid will need to have the telecoil activated.
Blue tooth – Nokia LPS 5 
The Nokia LPS5 is a bluetooth loopset that will work with any Bluetooth capable mobile telephone. This product is used by people who wear hearing aids or a cochlear implant fitted with a telecoil program (T switch). We have tested in house and believe that this is by far the best mobile phone listening solution on the market today that is specifically designed for people with a hearing impairment
T-Links – a simple solution for use in conjunction with hearing aids and are available as in monaural or binaural.
Monaural $89.00 + postage $10.00
Binuaral $110.00 + postage $10.00
For more information about telephones, mobiles and accessories contact us .