im not responsible for damaging your phone if u try to follow this !!!
*screwdriver (i used 3mm but 1.5 mm is optimum) (i bought 2 screws flat and crossed for 0.5 $)
*a piece of copper wire about 10 - 12 cm and thin diameter (i used a wire of my old damaged mouse) (cost nothing)
1-take of the 7 screws at the back.
2-with a flat screw ..... at the top right sider (at mp3 jack) enter the screw and rotate slowly and carefully and the plastic back will open clip by clip. (try to be careful cuz of weak materials). (after taking off the back cover take care of volume rocker button and lock button as the may fall and lost!!!!!) (take the battery off to avoid short circuits)
3-locate the GPS antenna terminal at the plastic back and at the motherboard (ignor the ground terminal)
4-at the plastic cover ...... put a piece of adhesive tape on antenna to be sure of its isolation
5-on the motherboard ....... put a piece of plastic adhesive tape on the marked area and pass the copper wire from the rubber piece as in the pic and make th wire get out at the area directly near the antenna (cuz it's opened at the back over)
6-reture the buttons in place and the back cover and tight the screws
7-cover the metallic areas over the SIM card and SD card and screw median to the camera by plastic tape to prevent touching of wires.
8-Now ............ u got the antenna >>>>>>>>>>>>u can bend it behind the battery cover but it won't make reception better as u thought >>>>>>>> OR >>>>>>>>>>>>> when u need it just take off the battery cover and get it out !!!!