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hi , my iphone x not working after remplace lighting port , i haven’t basebande fw and itunes give me erreur message ‘‘itunes could not check fort an update of carrier settings for your iphone an unkniwn error has occurred “ , constant searching network , reboot after 3min , you have an idea ? thank you for your attention

The first thing you should do is to double check your work. You may have accidentally damaged something during the process so closely inspect the flexes, connectors and surrounding areas on the logic board for any sign of physical damage. Use magnification if required. You can also re-install the original charge port to see if the problem persists.