If two iphone share the same itunes account, will there be a message error discovery?

if two apple phones use the same Apple ID number, they may receive iMessage information at the same time.

iMessage information is similar to QQ and WeChat, and its receiving and sending are independent of the operator, but it is different from QQ and WeChat. When activated, you must use the carrier network, but it doesn't matter after activation.

iMessage receiving and sending are also free.

you can turn off iMessage on one of them, so there will be no mutual interference. Of course, you can also use different Apple ID numbers under iCloud to use your mobile phone completely independently.