References
/articles/2007/0319/51127.shtml /cell_phone_index/subcate57_list_s2508 _1.html /
Conclusion
What's more, the old can more directly find options with big touch screen. When the call comes in, the cell phone will loudly ring and vibrate powerfully to remind owner. For software, it only has simple and non-smart system because old people can hardly use such complex system and different features. Beside these above basic features, this kind of cell phone also has other features ,for example, speed dial, any key answer, SOS key, health care and flashlight.
Conclusions
The cell phone we designed is specially suitable for senior citizens with its main features about helping them keep safe and connected. It is a bar phone with 3.5-inch touch screen. Considering the physical characteristics of the old, it has very big icon buttons and scripts. Because big icon buttons enable old people choose options clearly and accurately even though they are in bad eyesight and inconvenient activity.
