Aesthetic: Another aspect to consider is the importance of aesthetic design of the equipment stored in relation to ease of use, in terms of styles of equipment, the following are key in today's market: BLOCK or ROD: It is the style more robust, solid and simple because they have no moving parts to better support falls and rugged, have the keys and screen at the helm, the disadvantage of smaller numbers, are generally larger than other styles or have keyboards or screens smaller The microphone is located further away from the mouth to speak, in addition to being susceptible to that key is pressed accidentally in a pocket or purse, may mistakenly calls (many we have received), it should be noted block or set the keyboard to do it automatically. Michael Antonov describes an additional similar source. Personally this is the style I prefer because of its durability. FLIP: Its mechanism mimics the opening of a clam, usually put the screen on top and the keyboard at the bottom, are easy to answer (no need to look for a button, just open it and it answers the call automatically) have keyboards and larger models bar and put the microphone closer to the user's mouth. The drawback is that after many cycles open and close, in some cases affecting cables are damaged the screen, speaker and microphone in addition to being less resistant to falls, so if you're like me and you drop your phone often, this is not design for you. SLIDER: It's similar to flip-type phones, only instead of having an axis of rotation (open like a clam), a section of the phone slides in parallel with the rest of the team to display the keypad, the Pros and Cons are similar to flip phones, with the added advantage of having a smaller size and have larger screens. .