Comparing three mobile phones

We have three brand-name mobile phones : Motorola, Sharp and Sony Ericsson. Sharp mobile is like a Motorola mobile as they both have double screens. The Sony Ericsson is the best selling model, and has the largest camera 2 mega pixels. The Sharp is similar to the Sony Ericsson, but has less memory – it only has 64 MB, compare to 512 MB for the Sony Ericsson. The Motorola is cheaper than the other two models, and memory stick cannot be inserted externally. The Sharp and Sony Ericsson have a wider range of functions, including MP3, radio and Bluetooth, than the Motorola. In conclusion, it is worth to pay more for better models of the Sony Ericsson and Sharp.