*Works on all iPhone firmwares up to 3.0 and most cellular carriers*
* Personally tested on my iPhone 2G/3G 3.1.2 on Rogers *

If you have an iPhone but didn’t get a data plan be in for a shock after you see your bill. When out of range of a Wi-Fi access point, the iPhone will automatically connect via EDGE/3G periodically incurring expensive charges. Usually 5 cents per kilobyte, 1MB is $50!

Here is how you disable it.

1. Launch Safari on your iPhone
2. Go to iphonenodata.com
3. Tap the “Disable EDGE/3G” button
4. Tap “Install”
5. Tap “Install Now” to confirm

That’s it!

Go to “Settings – General – Usage” to check if you’re using anymore data. The counter shouldn’t go up from on.  As you can see, my phone never ever used any data.

If you try to browse a web page, this is what you see.  Data is blocked
.

Step by step pictures or video for those who likes visuals.

Video:

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Lots of people have reported iPhones that drain very quickly since upgrading to a new firmware.  It has nothing to do with this profile since I have iPhones that don’t even have Edge/3G disabled through profiles and it exhibits this issue.  Here’s what fixed it for me.  Be sure to setup as new iPhone and also turn off notification as per the images below.  My battery doesn’t drain as quickly as it did before.  If you googled this issue, you’ll see that this is an ongoing problem with Apple.  Hopefully one day a new firmware will fix it for good.

This is from http://blog.iphone-dev.org/

Unusual battery depletion is almost always caused by people choosing to “Restore from backup” instead of “Setup as new iPhone” when iTunes asks you. This isn’t caused by either the jailbreak or the unlock, but it’s a common 3.0 snafu. The fix is to just re-run the official 3.0 restore and choose “Setup as new” this time. Your music and apps and all that will still be synced, but you’ll get rid of any conflicting wifi, bluetooth, or carrier settings.

One of my iPhone’s batteries drained extremely fast.  It’s on Firmware 3.1.0 and 3G was enabled (I have a data plan for this phone).  I found that if you disable notifications it was back to normal.

To disable data on iOS 4, go into Settings -> General -> Network and turn off the Cellular Data option.

iOS 4 is laggy for most people who have the iPhone 3G. I have since downgraded back to 3.1.3. It’s much more usable even without all the new features. So if you upgraded to iOS 4, I highly recommend you downgrade.

Please follow the instructions here:

http://www.iphonehacks.com/2010/07/how-to-downgrade-iphone-3g-from-ios-4-to-iphone-os-3-1-3.html

This document describes the security content of iOS 5.1.1 Software Update, which can be downloaded and installed using iTunes.
For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.
For information about the Apple Product Security PGP Key, see "How to use the Apple Product Security PGP Key."
Where possible, CVE IDs are used to reference the vulnerabilities for further information.
To learn about other Security Updates, see "Apple Security Updates".

While iTunes for Windows allows you to connect multiple iPod devices simultaneously to the same computer for charging, you cannot sync your data from the computer to all the iPod devices at the same time.

Learn how to troubleshoot certain warning messages that may appear when you attempt to activate your iPhone or iPad.

Your <device> could not be activated because the activation server is temporarily unavailable.
The <device> is not recognized and cannot be activated for service.
iTunes was unable to verify your device.

Use these steps if:

The AirPlay icon doesn’t appear on your iOS device, or iTunes on your computer, after following instructions about how to use AirPlay or AirPlay Mirroring.
or
There are performance issues while using AirPlay streaming or AirPlay Mirroring.

iOS 5.1 introduces Japanese language support for Siri on iPhone 4S.
This article describes how to enable Siri and availability of the feature during the initial rollout.