Cover-More travel insurance is running a promotion where if you buy certain policies with a promo code you get a free United Networks Global SIM. I found the offer while searching for a promo code to use with my travel insurance. I couldn't find any small print that outlines the conditions for the offer.
The landing page for claiming the free SIM includes the promo code you need to use at registration. The SIM doesn't appear to come loaded with any value. It normally sells for $19.00.
If you want to skip a click, jump straight to the registration page and enter the promo code.
Thanks OP
Registration link is : https://offers.unitedglobalsim.com/en/registration