Hello. I bought a SE K750i over a year ago and then last month the phone just did not power up. The battery is ok. This is the first time that this had happened. I went to cell phone repair shop to have them look at it. They came back to me and said, "there is something wrong with the software and there's is nothing we can do." Has anyone had problems with this "great phone?" Was I suppose to update the software on this phone?