Joke Collection Website - Blessing messages - Why can't the SMS function work after my mobile phone card is replaced by Unicom card?

Why can't the SMS function work after my mobile phone card is replaced by Unicom card?

It may be caused by the following reasons:

1. Mobile phones do not support Unicom cards, such as mobile customized mobile phones.

2. There is no Unicom signal in the mobile phone environment.

3. Unicom card problems, such as shutdown.

Solution:

Question 1: Analyze whether Unicom card is supported through the mobile phone network standard.

question 2: check whether there is a connected signal.

question 3. try replacing Unicom card with mobile phone to ensure that Unicom card can be used.