Three Recent Computer News!!!

I have three recently computer news.
The first is that on 24th, number portability system began. The system is that users can be portable their present telephone number from Cellular Phone Company to different Cellular Phone Company.There are three cellular phone companies in Japan which are DoCoMo, au, and SoftBank. Each company is completely difference; therefore, if I wanted to change Cellular Phone Company to DoCoMo from au, I had to change my telephone number. However, now, I do not need to change my telephone number when I change Cellular Phone Company because of number portability system. As a result, it is good system for many people, but there is one problem about that. We have to change email address if people changed to Cellular Phone Company. Even the new system, email address cannot be portable, so some people will not use the system.
The second news has connection with my first news. That is that on 26th, SoftBank Company gave out that all types of SoftBank cellular phone are zero yen; in addition, telephone charge and mail charge are also free. As a result, many people decided to change Cellular Phone Company from DoCoMo or au to SoftBank. Therefore, on Saturday, SoftBank’s system could not catch up with the transaction of that, so briefly, the system did not work between DoCoMo and au and SoftBank.
Final one is that on 27th, thnke sparks were happened from laptops which are made from Fujitsu; as a result, users got burned. Its cause was batteries which are can charge of Sony make.