There are so many features available today in cell phones. They all make life easier in their own way like the camera. Almost all new phones today come with a camera. Some will be laking a flash and in a way this is good for dark places. A 3 megapixel camera or higher is what you want if you plan on printing them.
Bluetooth is another feature that allows you to use a wireless headset and hands free systems. Some have stereo for you listening enjoyment where others can wirelessly exchange pictures. If you are looking into a smart phone you can expect to find a app that will allow you to review documents and with some you can create, delete and edit them.
GPS navigation is in every phone to some extent. This is for emergency responders to find you when you dial 911. Some phones have maps and search engines that give left and right directions to your destination. Up dates on traffic is possible too but this feature will cost extra monthly. For those who wear hearing aids, you might find some phones interfere with it. Your doctor is the best one to tell you which phone is right your you.