One possible version:
The mobile phone is said to be one of the most useful inventions.It is playing a more and more importantrole in our daily lives.The first mobile phone was invented in 1973.It was really large and heavy,and could only be used formaking phone calls.Now,mobile phones are much smaller and lighter with many different uses.For example,wecan use them to take photos,watch movies and buy things no matter where we are.The mobile phone has madeour lives much more convenient than before.
In the future,I believe the mobile phone will become smaller and smaller,and we will make it work just bygiving it orders directly.Do you agree with me?