Data & Messaging Features, Internet Tethering

Can I use my iphone hotspot so my son can play music  and take pictures , on another device internationally if I have the International day pass Thanks

Maybe I need a new sim card mine does the same thing on 5g+ on a s23 ultra... SUPER ANNOYING and at&t hasn't been of any help for 3 months now

If I call someone from the US to another international country via WiFi calling, do I pay for the call?

New Iphone 13. Not receiving SMS text messages, previously received. Texts from financial and medical entities are not allowed through.  MAJOR problems (3 weeks now). Now, I am also not receiving SMS texts from fellow business associate board members, causing critical issues hindering work.&nb