I changed my Japanese iphone to new cell phone to reduce the monthly cell phone fee. The new cell phone is very unique. Since it is supposed to be for Kids, the phone's functions are very limited. For example... you can not register more then 10 phone number, you can not get/give phone call the person you don't register, the cell phone uses only Hiragana, and it costs only 75 yen/ month!!
I kinda liked the simplicity of the cell phone, so I played with it. I registered animal's name instead of real name and excited to get phone call from 'Hippo'