Chosen Solution
I replaced headphone jack successfully but my phone still thinks it’s in headphone mode. When I connect the headphones the sound come out through them. When I unplug them the iPhone still thinks the headphones are there. I test this logic Board in two iPhones and the same error, so the problem is in the logic I guess Any ideas? UPdate: the iPhone is always in headphone mode, even if I plug or unplug headphones (originals)
I think there is a problem with the detection circuitry on the logic board. You would have to get another logic board to correct this problem.
Your iPhone is only made for use with an iPhone Headphones which if compared to a Standard Headphone jack are different. Use the original headphones and plug them into your H/P jack and unplug. This is a common problem only caused by use of standard headphones. The iPhone H/P jack has 3 sections, left, right and mic. You will see on the jack 3 sections. If you are going to use a regular headphones. you need an adapter.
