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Released September 22, 2017. Model A1864, A1897. Available as GSM or CDMA / 64 or 256 GB / gold, silver, and space gray.

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I need to know which hardware receives sim network signal in iPhone 8+

I need to know which hardware receives sim network signal in iphone 8 plus because I tried replacing back glass and now network keeps searching but no network. and while i was replacing back glass it, i broke a part which was in between back camera and its flash light. does it some where related to sim network or do i need to check something else. any input highly appreciated. Thank you. or ask me again if you want to explain it more.

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If you had to replace the back housing I would think the iPhone took a bad hit and it would be quite likely the issue was already there before replacement and/or the handling of the board made the damage just evident. No service flag with request to update is typical of a hardware damage to the logic board where the processor can’t find the baseband. It could be due to a number of components and will require deep microsoldering skills to be fixed. The only thing you can try is a DFU restore, but there are serious risks it won’t complete and phone will be stuck in restore mode until fixed.

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The SIM socket is located on the logic board as marked here in Purple

Block Image

You need a SIM held within it to tell the radio what bands your cellular carrier uses and can identify your phone.

If your SIM socket is damaged and/or the cellular radio logic is damaged as well as the connections to the antenna units then you can encounter inability to connect to the network.

Breaking parts is always a bad sign. Post a clear picture showing the damage and leverage the pictures within the iFixit teardown iPhone 8 Plus Teardown to identify the broken part/s so we can see more clearly what you are facing post a marked up picture as well Adding images to an existing question

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hello thanks fr ur reply., it says "mobile data update failed".

your iphone cannot make and receive calls or access mobile data until it has updated

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Can you identify the part you broke - Picture please

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This answer was originally to another question.

Try these steps:

  • Turning off Wi-Fi calling and Voice LTE may fix the problem
  • Open Settings and tap Cellular -> Wi-Fi Calling. Turn off the switch next to Wi-Fi Calling on This iPhone to turn off Wi-Fi Calling and go to Settings -> Cellular and tap Cellular Data Options. Tap Enable LTE -> Data Only to turn off Voice LTE. You’ll know Voice LTE is off when the blue checkmark appears next to Data Only.
  • Turn Airplane Mode Off And Back On
  • Turn Cellular Data Off And Back On
  • Check For A Carrier Settings Update open Settings and tap About to check for a carrier settings update. If an update is available, a pop-up will appear within about ten seconds.
  • Eject your Sim Card and Turn off Your Phone Once the device has been powered down reinsert the SIM and then power the device back up.
  • Reset Your iPhone’s Network Settings
  • Put Your iPhone In DFU Mode

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thank you, brother, for your reply, but i replaced the back glass myself and then it turned like this. and i settings about and in the carrier it says "no carrier" I tried all the above but still no use. do you think logic board has the problem?

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