Texts with no number attached

[colly]

I can't text without my number showing. So how come l get advertising texts and messages with no number attached.
Anyway to block texts with no number shown ?

 

[Deleted member 26715]

There is usually a short code number

 

[classic33]

I can't text without my number showing. So how come l get advertising texts and messages with no number attached.
Anyway to block texts with no number shown ?

https://timwolverson.wordpress.com/2017/09/23/block-spam-sms-with-no-number/

 

[colly]

Thanks @ classic33. Exactly what l needed.