United offer me 90 days Premier Execute status. I am flying Thai and LH soon, and would like to have the UA *G in the reservation to get potentially upgrades and priority if something happens. As UA don't give me the physical card, would Thai and LH still recognize me as a UA*G? What about at check-in, would they require the physical *G card to confirm the *G priveliges for the flight?

I already have a SK*G card that I can show to get into the lounge, but as I will credit the miles from these flights to UA, it would be easier to have th UA*G in the reservation instead of the SK*G.