Joke Collection Website - Blessing messages - What if the mobile phone sends a text message and the other party shows that the reception is invalid?

What if the mobile phone sends a text message and the other party shows that the reception is invalid?

1, it may be that the other party's mobile phone signal is unstable;

2. It may be that the mailbox space where the other party's mobile phone stores short messages is full;

3. It may be the problem of the other party's mobile phone itself, such as: the mobile phone is out of order or the mobile phone is not turned on for a long time.