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Thread: Replace 3g iPhone Sim Car Junctor/Reader

  1. #1
    Default Replace 3g iPhone Sim Car Junctor/Reader
    I picked up a cheap 3g 8gb some time ago that wouldn't detect sims cards, opening it up quickly revealed the reason - someone must have used a Turbo sim type adaptor previously and got it stuck - all the pins on the sim reader were wrecked - misplaced and one was actually flopping about loose inside the phone. Since then my lad has been using it as an ipod touch with camera, but at the weekend I picked up another 8gb 3g - this time it looks like it is IMEI blocked - it gets the carrier but no signal on o2, on Virgin it gets carrier and full signal but all calls fail. So I figured this could be the 3g ipod touch and I'd replace the sim junctor on the other one and get it running fully again....

    So I desoldered the old Sim Junctor, positioned in my new one (see 3g Sim Junctorand very carefully soldered it into place - most solder remained so I only needed a touch extra to keep it in place. Rebuilt the whole iphone, booted it up - it worked which was good news - but inserting the sim still came up with "No Sim" Dissembled the whole thing again, went back over the solder points and made sure they were all good, redid a couple and built it up again. Still no joy - it boots up fine, but does not detect a sim when inserted.

    My question (finally) is - has anyone successfully replaced a sim junctor before? Am I missing something important - I figured it would simply be remove the six old mounting points and then rejoning in the six points on the new one. Or do I need to have yet another go at making sure all six connections are fully soldered in - although each connector literally sat on the old solder anyway - so my topping off would only really have been to seal it into place.
    iPhone 5s 64gb iOS 7
    rMBP 15" 16gb 500gb
    @c0ff33a and @PhoneMainiac

  2. #2
    It could have nothing to do with the SIM card reader and could be an issue with the main board.
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  3. #3
    Thanks for the reply, so in theory when whoever had it yanked the turbo sim out taking the sim junctors with it - shorting them together and no doubt against the metal sim retainer housing - this could have damaged the sim card reading part of the Mobo.

    I prefer this theory to the thought I am rubbish at soldering and botched the install of the new junctor - I think I'll let sleeping dogs lie it still works as a iPod touch with camera it can stay like that.
    iPhone 5s 64gb iOS 7
    rMBP 15" 16gb 500gb
    @c0ff33a and @PhoneMainiac

  4. #4
    iPhone? More like MyPhone krazy's Avatar
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    Quote Originally Posted by Robcoffee View Post
    Thanks for the reply, so in theory when whoever had it yanked the turbo sim out taking the sim junctors with it - shorting them together and no doubt against the metal sim retainer housing - this could have damaged the sim card reading part of the Mobo.

    I prefer this theory to the thought I am rubbish at soldering and botched the install of the new junctor - I think I'll let sleeping dogs lie it still works as a iPod touch with camera it can stay like that.
    I could also check it out for you. I did 15+ sim connectors last weekend. Check out my work in my sig
    How to fix #3 CONNECTORS:
    http://hectordtruong.blogspot.com/

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