How can I send and receive messages with the Japanese version of Apple mobile phone with card stickers?

This is rather troublesome. You have to take off the card sticker first and use the card directly. If there is an extra cellular data option in the cellular data, you can set it in the store. The specific settings are as follows.

Settings > General > Network > Cellular data network

format:

APN:CMNET

user name:

password:

APN:CMWAP

user name:

password:

MMSC:MMSC.MONTERNET.COM

MMS agent: 1..

But the important thing is that if your card is directly inserted into the card slot, the Japanese version will ask you to activate it. You have to pull out the card before activation, and insert a sticker to avoid activation. This time is relatively short, depending on whether you can succeed. Note that it will take a long time to do this for the first time, and then the activation page will jump soon after the second time. You will have a greater chance of success at the first time, and it will be difficult to succeed later. You can try. Good luck!