Me and my co-founder are integrating mopub into our test app (via TestFlight) and we’ve ran into a weird issue. The ads (applovin, iad, admob, vungle) are not showing for me. I live in Brazil and I cant see neither banner ads nor interstitial ads. My co-founder, on the other hand, lives in the US and he sees everything (all ads show properly on his device). We both have iPhone 5S.
Would you have any clue on why this could be happening?