You may prefer a mobile device that is lightweight, has touch screen or large well-spaced buttons. Your mobile phone provider will help you choose a device suitable for your needs.
There are also accessibility options on your phone that may be useful, for example – voice activation like Siri, which will respond to your spoken instruction. There may also be a sound or vibrate function which lets you set buttons so that you know what you are pressing.
Look in ‘Settings’ on your mobile device, for the accessibility options available to you.