Terrible... I completed two separate offers worth roughly 4,000 coins. It didn't receive them so I put in a service ticket or them both with picture evidence that they were completed. And I am 100% positive that everything to get the offer was done and done correctly, I am also 100% sure that I had never downloaded those apps on this phone. Phone let alone ever... Both offers were denied... Why they were denied, your guess is as good as mine.