How to Install iOS5 Without a Developer Account and Activate Using a Backdoor
WARNING: iOS5 is still in the beta stages. The method below should only be used by people who absolutely understand what they are doing and the risks involved. There are rumors that once you upgrade to iOS5 beta you will not be able to downgrade back to a jailbreakable firmware until iOS5 is officially released. I updated to 5.0 this morning and downgraded back to 4.3.3 this afternoon with no problem, but please err on the side of caution.
It has only been one day since iOS5 beta 1 was released to Apple developers and already @merterdir has found a way to activate the iOS5 beta firmware without the use of a developer account. The first thing you need to do is download the iOS5 beta firmware IPSW file. Since this tutorial is in a bit of a gray area between legal and illegal we cannot provide any direct links, but I am sure if you use Google it won't take you long to find it Also, please keep in mind that there are no jailbreak options for iOS5 yet so you will lose your jailbreak/unlock. *update* MuscleNerd has announced that an iOS5 tethered jailbreak is possible via the limera1n exploit which has still not been closed.
Once you have downloaded the iOS5 firmware, simply open iTunes and either shift+restore or shift+update depending on if you want to start off fresh or update your current firmware. Select the iOS5 firmware file that you downloaded. After it is done restoring the firmware you will be greeted with a new activation screen. At this point, if you had a developer account, iTunes would detect your UDID and activate the device if you had a dev account. This is where merterdir's backdoor comes in.
Step 1: Tap the home button 3 times activating voice over
Step 2: Tap the home button 3 times again which will open the Emergency Call screen
Step 3: Click on "emergency call" and as the screen is switching swipe down with 3 fingers(timing is key)
Step 4: At this point the new iOS5 Notification Center should appear
Step 5: Click on the Weather widget to open the Weather app
Step 6: Now simply click the home button to exit to the springboard and you're all set!
After you are on your springboard, you still need to do one last thing in order to to activate your cellular service. First you must jailbreak your iOS5 beta using the redsn0w 0.9.8b1 tethered jailbreak and then follow these steps:
Step 1: Open Cydia, go to the search tab, search for iFile and download it
Step 2: In iFile navigate to the location System/Library/CoreServices/SystemVersion.plist and open it in the property list editor
Step 3: Remove the release type key and save
Step 4: (iPhone only) Go back to Cydia, add the source "http://repo.bingner.com/" search for "SAM" and install SAMSprefs
Step 5: (iPhone only) Go into settings, then SAM, and setup the carrier
Step 6: Reboot your device and boot tethered with redsn0w and setup your device.
Once you've done this you'll be able to use multitasking, iCloud, syncing and iMessage along with all the other features that required activation to work!