Why can't China mobile phone card receive SMS verification code in Japan?

The reasons why China mobile phone cards can't receive SMS verification codes in Japan are as follows.

1. No international roaming: China Mobile's mobile phone card has no international roaming function, so it is impossible to receive China's SMS verification code in Japan. You can contact China Mobile Customer Service to open the international roaming function.

2. Restrictions of Japanese operators: Some Japanese operators will restrict the SMS receiving function of foreign mobile phone cards, resulting in the inability to receive SMS verification codes. You can try to change the network of other operators, or receive the verification code in other ways, such as voice verification code.

3. Unstable network signal: The network signal in some parts of Japan may be unstable, which makes it impossible to receive SMS verification code in time. You can try to re-receive the verification code in a place where the network signal is good.