A lot of these so-called international sims are just crap shoot! I have been through several of them. I had issues with tru recently in Jamaica. See this thread.
http://www.prepaidgsm.net/forum/inte...e-ships-2.html
Phones: Xiaomi Mi Mix 2, Samsung Galaxy A50, ASUS zenfone 3,
Sim cards: AT&T (Contract), 3 UK, Piranha Mobile