Advantage of using cellphone

I am going to write about advantages to use cellphone. Cellphone sometime bother people. but still there is a lot of advances to use. first of all, we can use for call and text message. we can use call or text message for different situation. If people want to contact someone but the person already know the person's schedule they can text and later receiver can reply by call or text message. second, parents can contact to son or daughter easily. if they was late to come back home, parents can call and make sure their position and he or she is OK. also in japan, there are kid cellphone, the cellphone has GPS system so parents can know there position by Internet or cellphone. Finally, we can use cellphone as entertainment I mean I lot of function. nowadays cellphone device grow up so fast and we can enjoy to see TV program, to listen music, to play game, also we can use as money in Japan. For example, In Japan we can use cellphone to ride transportation and buy stuffs. so it is same as credit card. In conclusion, cellphone has a lot of function that people life make more better and better. but we have to think about situation to use like don't talk in train or turn off cellphone in the theater.