Assuming you mean your mobile phone network and not the WiFi network, check that the GSM antenna is still connected properly after you opened the phone to replace the USB daughter board.
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The antenna can be seen being removed in ''Step.18'' of the ifixit [guide|138323] guide.
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The antenna can be seen being removed in ***''Step.18''*** of the ifixit [guide|138323] guide.
Hi,
Assuming you mean your mobile phone network and not the WiFi network, check that the GSM antenna is still connected properly after you opened the phone to replace the USB daughter board.
The antenna can be seen being removed in ''Step.18'' of the ifixit [guide|138323] guide.