iMessage/Facetime number won't verify. Can't return some texts.

[Ctoumba]

iPhone8

iMessage/Facetime phone number won't verify.

I also can't reply to 5-digit text numbers and some 10-digit phone numbers.

Apple support referred me to Verizon.

[vzw_customer_support]

We know how important it is to stay connected. When did this first start happening? Have you made any recent changes to your device or services?

EllisandraC_VZW

[itsjavierb]

Have you tried toggling iMessage and  Facetime off, and then restarting your device. As soon as you turn it back on, connect to Wi-Fi, and turn iMessage/Facetime back on and wait. It should register then. 

This happens to me sometimes, so just try that and it should work!