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CDMA version of the fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. 16 or 32 GB / Model A1349 / CDMA compatibility.

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Where do I clean if I got finger oil on my parts?

I had my iPhone into a shop for repairing when my power button failed. After I got it back, I have very bad bluetooth reception and almost non-existent WiFi. I remember that the shop did not use gloves. I took it back there and they are denying all responsibility.

So I assume that there's probably some finger oil on various parts and I've seen all of the suggestions on here about cleaning "all contacts" with a degreaser or Windex. But I don't know what "all contacts" are. Can someone help me out and point them out?

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Any help?

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Thanks, Brett. I didn't check this until after I left work so I will try on Monday when I have access to my Pentalobe screwdriver.

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Hey Snowdog,

This is a pretty common problem, and you're correct about the finger oil causing bluetooth to fail.

There are a couple places that you should clean the contacts before re-assembly. While many of connectors in the iPhone use plug-and-socket connections, many just use spring pressure contacts. These pressure contacts are those which you should clean off. Here are a few:

Use some isopropyl alcohol or some Windex on a Q-tip or microfiber cloth, and you should be golden.

Good luck, and let us know how it turns out.

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iPhone 4 Power & Lock Button Replacement

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15 - 30 minutes

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iPhone 4 Verizon Power Button Replacement

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