There are many types of local mobile phone cards in Japan. The cheapest one is the Anger card. The more famous ones are: DMMmobile, B-mobile, IIJmio, and CMLink card, among which Chinese students use it more. It's a China Mobile CMLink voice data card. Because of its low price, 1,500 yen per month can solve the problem of mobile Internet access. The customer service service is good in both Chinese and English, and the voice is too gentle. Compared with other small brands, CMLink cards will not spam text messages or scam calls, and identity information is also guaranteed. After all, it is launched by China Mobile and is trustworthy! CMLink also offers a number portability service. If your friends who already have a phone number in Japan don’t want to change their number, they can choose to port their number to China Mobile CMLink.