Joke Collection Website - Blessing messages - Why is sending 6670 SMS delayed?

Why is sending 6670 SMS delayed?

This is the situation that the network signal is not good ~ it will preset the retransmission time, and if you want to retransmit in advance, you can also use the "Options" operation ~ ~ ~ After delaying the transmission for many times, it will show that the transmission failed, which is the reason for the signal. It is recommended to go to an open place and try to send it.