My new Microsoft Lumia 640 is sending the same texts several times. Why?

[Windows Central Question]

I sent a text to a friend, and he got the same message 5 times in a row. Why? Any explanation?

 

[anon(8010562)]

I sent a text to a friend, and he got the same message 5 times in a row. Why? Any explanation?

This is usually caused by cellular network. Not phone.

 

[RumoredNow]

This is usually caused by cellular network. Not phone.

Probably one of the two of you was in spotty coverage so the system never got the "all done" from one phone or another.