[Q] Ripped off contact on phone middle frame

I got an gt-s5830i with gingerbread 2.3.6 comes with the factory system. The phone get broken, so touch screen and the cover from behind where the battery is. So for couple days the back was covered with tape to avoid the dust and the sand going in on the battery, mainboard etc, dont do that is a really bad idea!!! The tape get ripped off with the handling getting part of a flex cable that looks like black patch frm outside and inside got a little copper plate. The phone works fine and i dont see where this part affects the device. Only the headphones are working strange about not aligned contact cause i don´t use the original phones. Can somebody say what is this part and how can affect the device???
I found nothing on the service manual about this, if is a kind of ground circuit, or interference filter. Pictures attached.

amolgosavi said:

I think that was network strip..like antena

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Probably yes, but i can make phonecalls and use the wifi, even sometime i got 3G connection, maybe is enough with the tiny part that remains on the phone???.i ask cause i gonna replace the touch screen cause is really broken, and was thinking if i buy this strip and not all the middle case. I found 3 pictures to have a better idea where this strip got contact to the mainboard, to clear was for function this strip has. Follow the red arrows. Is amazing to have so quick answer, i will keep looking thanks!!!:laugh: