you would have to take to a pro
factory reset it and then recover it
This is simply caused by a defective LCD display. Personally, I would contact an professional iPhone repair business to have this fixed. Reason being, fixing iPhones can be a very difficult and time consuming if inexperienced with working on these devices. If you do decide to do it yourself, purchase a new LCD display for your iPhone 3GS and then visit YouTube to watch a tutorial on how to do it.
If by "fix the iPhone 4" you mean fix the problem with the antenna and people putting their gig
The following 4 ways can help you to repair your iPhone Stuck on Black Screen: 1.Fix iPhone Black Screen Problem with TunesKit iOS System Recovery Step 1, Connect iPhone to the computer Step 2, Download frimware package Step 3, Fix your iPhone 2,Fix iPhone Black Screen Problem by Hard Reboot 3,Restore iPhone to Factory Setting to Fix iPhone Black Screen 4,Seek for Apple Genius Bar to Fix iPhone Black Screen
If you have an iPhone 3g or 3gs the glass/digitizer/lcd is one unit and must be removed with a suction cup and remove the 2 screws at the bottom. If you have an iPhone 4 or 4s cracked front screen the whole phone needs to be taken apart. The back is easy to replace. You can buy the back from a repair shop or online and remove the screws at the bottom and slide the back cover up.
There are videos showing how to fix a dropped camera on ehow, however, if the camera does not work once it has been left to dry, it is unlikely that the camera will be fixable.
Double tap the screen with three fingers and it will go back to normal, in future if you want to magnified your screen again just tap the screen with three fingers again and it will be magnified.
The battery is defective. Yes certain types of batteries have a "memory", but if it dies very quickly, it needs to be replaced. If it is under a year old, apple will fix or replace it free of charge.
Yea there couple of options you have to fix your iPHone, you can buy the part and do it yourself, or you can have a tech repair you iPhone very quickly check out this site you can buy parts or have someone fix your cracked screen for you www.iPhoneiRepair.com
I would take it to a reliable camera shop in your area. They are very knowledgeable on just about every camera on the market. If they are unable to fix it I am sure they know where you can go to get it fixed.
get the new camera..
Go to the store that you brought the device and ask them to repair your back camera