Your iPhone 3GS Headphone jack might encounter problem because of one or many reasons. It could be due to dirt and dust trapped in that might make it non-functional.
Whatever the reasons may be, if your headphones don’t seem to connect, or they are not at all reliable, you can trust us to get your iPhone 3GS headphone jack repaired and working like before.
Trust us, we are the experts! You are always welcome.