Mobile phone are vital nowadays.I agree since it is a great technological advance.
-the first advantage that the mobile phone is that you can take the mobile phone with you not to lose important calls.
-An other advantages is that if you are lost,it can call to obtain instructions and, this way, you come to the place that you want to go.
-Also with the mobile phone you can listen to music,write text messages and play there when bored.
In conclusion the mobile phone is vital today to be able to call when you are not at home.