Shape and Size
All the smartphones have touchscreens with virtual keyboards. Phones with a physical keyboard tend to be thicker. Look for phones that you find comfortable to carry and operate with one hand. Models with very large screens are great for viewing Web pages, maps and videos, but some may be more than a handful for most users.
The bigger the window, the bigger the view. A big screen has a direct impact on the presentation of Web pages, maps, videos and photos. A large display also makes it easier to interact with your phone because Web links, app buttons and keys on the virtual keyboard should be easier to spot. At the same time, make sure the phone is not so big that it is uncomfortable to carry or difficult to operate with one hand.
A phone’s shape and size are largely determined by its keyboard and display. Regardless of which keyboard you go with—real or virtual—make sure it has all the keys you’ll need, and that they are well spaced and easy to read under different lighting conditions for comfortable and convenient usage.
Using a phone’s extra, network-dependent capabilities requires a regular (voice/text) phone plan and a data plan for Web surfing and sending and receiving email.