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Sim reader replacement, will not read a sim!

Hello ifixit,

I come with a question about sim reader replacements on iPhones. I just started trying to replace these, so far I've done 3 phones and none of them will recognize a sim card. They were physically damaged readers that I replaced, no water damage of any sort. When I take a multimeter to the finished product, everything ohms out the same as a perfectly working sim reader that's never been replaced. I'm getting all 4 anchors attached, as well as the 6 pins in the middle and the 2 at the back for the little spring arm. I've been using 400 degrees fahrenheit to remove the readers as well as covering unwanted areas in kapton tape. When I put the new reader on, I notice it doesn't sit down perfectly flush, but everything is connected and seems to have correct resistances. For the life of me I can't get them to read a sim though, or pick up anything! Please help!

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I had this problem also. I took the phone apart to look at the reader, and the tiny solder points scared me. I had pulled the phone apart and so I just put it back together and set it aside. Then, a few days ago I tried the phone for the heck of it, and it worked. All that I can think is that one or more of the connections was loose or corroded and not making contact, and that the disassemble and reassemble corrected the contact issue... just a guess.

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Josh White estará eternamente agradecido.
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