Call your telephone company. The company that is providing your service might have options for phones without any or a limited additional cost. These services might include accessibility for the death or hard of hearing population, or for individuals with minimal physical impairments.
Scanning Telephone: The use of a phone that has a scanning feature can be very beneficial for a user with limited mobility. The telephone featured below has a remote control that allows for any ability switch to be plugged into it. There are 20 preset numbers that can be pre-programming. When the user presses the switch, the scanning through the 20 preset numbers begin. The speed of the scan can be adjusted for the user. Once the scan gets to the desired number, the user presses the switch again and it dials out. To answer or hang up, the user only needs to hit the switch. Not only can this be accessed by a physical switch but by an air switch as well. If the user cannot use their hands, the physical switch can be mounted by their head or the air switch might be appropriate.
Voice Amplification: If an individual has issues with the volume of their voice, using a telephone can be very challenging. The people that they are speaking with might be unable to hear or understand them, asking them to constantly repeating themselves, requiring more energy for telephone use. A nice solution might be using a telephone that amplifies the speaker. There are many options that amplify the incoming person for a hand of hearing individual but limited for amplifying the outgoing for low volume. There are some "inline" amplification options that connect between the phone and the wall. There are also telephones that amplify through the handset, pictured below.