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Why my phone has weak gsm signal?

I followed the guide to change display with frame. Now I notice that my phone has problems to receive gsm signal, above all when it’s indoor. Looking the old frame, I see that there are some little pieces of conductive tapes in precise points

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Maybe thes points are useful to connect motherboard to ground?

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Static electricity can cause bad signals with antenna’s so maybe try to buy some conductive tapes and placing them on these points to get that charge out of there. It should be worth the try

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thanks for answer.

i tried to put some conductive pads, but signal is still weak.

If I stay indoor far from window, phone can’t transfer datas by 3g/4g even if signal indicator is good. I see that indoor phone is not able to work by 4g.

If I stay outdoor, phone works perfectly (also by 4g).

It seems that antenna doesn’t have enough power.

I noticed also that the weight of 10kg falled nera sim holder on the display where maybe there is gsm module of mainboard.

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Massimo Martucci 이(가) 영원히 고마워 할 것입니다.
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