How do I revert my Samsung Galaxy S3 to stock unrooted?

Bajanrose

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Jun 30, 2015
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I currently am running cyanogen mod that a coworker installed on the S3 I have for a previous owner and in my eyes it was working fine when I purchased the phone third hand.

I had subscribed also to a few data plans and never had a problem until the last data plan subscription. I took it down to the service provider and the technician said it might be that my rooted phone is causing the issue. I never had a problem before so found it odd but he took my sim card out, put it in another phone and the data plan was working just fine but in my phone, it just wouldn't even though the settings are correct.

I would like to unroot the S3 now to see if I can have this problem fixed and would love some assistance. From what I can tell the phone is using SuperUser as that's what usually asks to request permission for apps that I install.

How do I return my phone to stock ROM without damaging it?

Thanks!
 

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