I am guessing you want to write OEM instead of “EOM” that you wrote.
OEM’s are the ones that are produced by the phone manufacturer itself and this one is perfect. But every third party manufacturer claims to have premium quality spare parts but that is not true.
Here in my country we don’t make online orders for spare parts, we go to China or Dubai and compare the spare parts and we buy the better one. But the spare parts are available on ebay,alibaba and amazon.