我们使用的手机一般都是10个键的,单现在有一款新手机,数字键仅有5个……　　　　
　　we know that there are usually over ten mobile phone. but look at this mobile phone. have you found out that there is anything different? yes, it s a special mobile phone. it has　a simple keyboard with only five keys.it can be preset to call a specific number. children can call someone by pressing the right key. the new phone is also better for the old people with poor memories. it also sends lees radiation than the mobile phone we use now.