If you're taking a bit longer to get to the phone, or if you're finding it harder to sit or stand still while talking on the phone, then a few small changes could make a big improvement to how you communicate.
There are several organisations that can help you if you have limited mobility. Your local authority might be able to help with special equipment and assessing your needs. An occupational therapist can also work out what extra support you need.
GARI - the Global Accessibility Reporting Initiative – also has information on their website which may help you find the best device for your own needs, whether sight, hearing or dexterity.