Can't send Text to Global M2M GSM Number

[Paul_M]

My iphone XR won't send texts to a Global M2M GSM Number.

[Cleoriff]

@Paul_M 

Check this Guide: Text Message Tips (not sent or received) 

[MI5]

@Paul_M 

Do you have a spend cap on your account?

Guide: Spend caps on O2 

You need to contact O2 to change it, if so.
All numbers are in this guide Guide: Coronavirus Community Help and Support 
When you call, you will be asked for the reason you are calling.
Stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
You can also try saying "Upgrade" or "Fraud" to be connected to an advisor.
8.00am is the best time to call if you can.