Answer to: After replacing screen camera app now stuck on shutter?The rear cam will work fine but when you switch to the front it locks the shutter, third party apps that only use the rear cam won't tell the whole story.. Its not the cams the software or the firmware. The issue lies on the logic board as stated in my earlier post.. check it out ..
Answer to: After replacing screen camera app now stuck on shutter?http://www.gsmindia.in/forum/apple-iphone/57925-iphone-4-front-camera-not-working-solution.html The problem is a tiny jumper that gets damaged or falls off during disassembly. It's just above the 3rd-from-the-right ribbon connector to the logic board on the iPhone 4. If it's missing, the front camera won't initialize and will lock the shutter for both cameras. I found the answer and a picture of it on gsmindia.com. I used a circuit writer pen from Radio Shack to jump it, and all was well again.