Can you jailbreak an iPhone 4.0?

Answer 1

ON the phone go to jailbreakme.com that's how we do it at www.phonetraderonline.com for our customers.Yes you can

follow these instructions

Jailbreak:

Step 1. Update to 4.0.1 or download firmware below

• iPhone 3gs 4.0.1:http://appldnld.apple.com/iPhone4/061-8618.20100715.Zapn4/iPhone2,1_4.0.1_8A306_Restore.ipsw

• iPhone 3g 4.0.1: http://appldnld.apple.com/iPhone4/061-8616.20100715.phnt4/iPhone1,2_4.0.1_8A306_Restore.ipsw

• iPhone 4 4.0.1:http://appldnld.apple.com/iPhone4/061-8619.20100715.4Pnsx/iPhone3,1_4.0.1_8A306_Restore.ipsw

Step 2. Then restore your device

Step 3. After, on your idevice (your iPhone) open up safari

Step 4. On the address bar enter www.jailbreakme.com

Step 5. Read info, Then slide to jailbreak

There You Are Done!!!

Do it now before Apple put a stop to it

Unlock:

You must have your device jailbroken first

Step 1. Open up Cydia>Manage>Sources

Step 2. Touch 'Edit' then you'll see 'Add' touch it

Step 3. Enter 'http://repo666.ultrasn0w.com/'

Step 4. In Cydia search for 'Ultrasn0w' and then install it

Step 5. Reboot your iPhone and there you are done!

*Warning* T-Mobile users must disable there 3g before installing Ultrasn0w