Hello,
First of all, I did the most stupid thing an iphone user without hardware experience on it could do... I open my iphone...
I follow a couple of videos from different web pages in order to replce the silver back cover of my phone to a black cover.
After hours of taking all the components from the back of the original cover I was placing the components back on the black cover...
When doing this I accidentally broke the ribbon cable that goes from the volume buttons to the earphone adaptor.
I´m a electronic engineering student so I decided to re do the cable. I got it working, however for some strange reason now my wireless singnal is really low, and the only way I can have wireless is beeing behind the router.
Today I order a new Apple iPhone OEM earphone flex cable that includes all the components that were supposed to be located on the back cover. However I´m not sure if the wireless anthena is part of it. Actually I´m not sure where is it located on my iphone.

In advance I thank you all for the help

PD. NEVER OPEN AN IPHONE IF YOU DON´T HAVE ENOUGH PATIENCE TO PUT IT BACK TOGUETHER!!!