What is the differeance between iphone g3 to phone gs3?

Too many steps to write here. Do a Google search, "root g3" or related. Here's a link to get you started: http://gs3.wonderhowto.com/how-to/easiest-one-click-root-method-for-your-samsung-galaxy-s3-0155625/

Try going into settings and then display settings

Thank for contacting Fixya, I will be glad to assist you.

What you can do, in order to resolve this issue, is start by resetting your iPhone 3G.
(Note: this does not remove any settings, data or media you have installed in your device)
• To perform a hard reset, press and hold your Sleep and Home Menu buttons for approximately 10 seconds.
• Once your screen goes black, release both keys. (If you see a white Apple logo before you release the keys you have held the keys to long and will need to start the reset process once again)
• The next screens you should see after the black screen, is the Apple logo screen followed by the main screen.

• This hard reset process should help bring your iPhone 3G back to normal functionality.

It would also be advisable to connect your iPhone 3G via its docking cable and provided wall socket adapter into a working wall socket in order to try and charge it.

If your iPhone 3G still does not charge, try connecting it with the docking cable to your computer or laptop to observe if it will take a charge then.

Should this process also not affect the way the iPhone charges, then you should look into using or purchasing another iPhone docking cable, as the cable itself may not be functional and needs to be replaced.

Docking cables for iPhones are fairly inexpensive (Under $20) and can be found in most electronics/computer stores that carry Apple products and accessories.
(Link: Apple Dock Connector)

Finally, if a replacement docking cable does not help the iPhone 3G charge, this may be a hardware issue and you would be advised to take the iPhone 3G in to your local Apple retail store or Apple Authorized Service Provider in your area.

Regards,

-The MacTechTrainer

here is for you:http://manuals.info.apple.com/en_US/iPhone_3G_Important_Product_Information_Guide.pdf
and:http://manuals.info.apple.com/en_US/iPhone_iOS3.1_User_Guide.pdf

all other iphone manuals can be found here:http://support.apple.com/manuals/#iphone

You should try to reset your iPhone:

Press and hold the Sleep/Wake button and the Home button at the same time for at least 10 seconds, until the Apple logo appears

No problem! I have the perfect solution for this! Open Cydia from your iPhone, add the iPhoneModding repo and then install Push Fix.
Click here to visit my blog for the step-by-step guide.
For more iPhone / iPod touch tips, click here.

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The problem was solved by going into Settings General Acessibility and turning Off Zoom function. However I still don't know the cause of the initial problem.

I downloaded g3 update on my 1st genertion iphone now it locked up how can i fix it ???

I've got my G3 a couple of months ago and in the setting I adjusted my screen brightness to the minimum level that I feel comfortable with. That did help improving the battery life. Also two more things helped as well. If you keep your bluetooth on at all times that will use your battery. The last thing that I realized was the wifi mode. Since I have free internet access came with the Iphone plan I turned my wi-fi off and it help me with the battery life too. I get avarage of 3 days from my phone without charging it now.