Works but does not respect the title of sale

for the price of 2 euros fdp included I'm not even asked myself the question I clicked to buy. In the title of sale it is stipulated that the product supports iPhone 3G 3GS and 4. However when I received the product I am surprised because the product will light well when it is on, but iPhone (3GS) that I use do not react. So I tried with other 3GS without success, when the last attempt was made to him with an iPhone 4. it responds correctly. for my part I sold the product to a iPhone 4 holder for the same money (2euros it's not much, I admit), I just puts warning iphone owner 3GS, go their way, as the product does not work for this unit. this being the person that I bought for iPhone 4 is very satisfied. and I say that yours has the product was delivered quickly.