How to Unlock iPhone 4 online?

Is there any way to unlock iPhone 4 Online without jailbreaking.

You can follow this link for free unlock http://freeunlockiphone.com/ or this for a small fee http://depeaktech.wordpress.com/diy-online/

Don't do that. Those unlocks may not work and they are temporary. After another restore, it defaults back to its original activation policy (it locks to the original carrier), or it may be locked to the next carrier you use. Find out who it is locked to (AT&T? T-Mobile? Verizon?) and contact them to request an unlock. They will unlock it unless you did something shady, like skip out on the bill. The unlocks from the carrier are true unlocks, should not cost anything, and your phone will not be locked in the future!

Yes you can unlock you iphone in easy way. You can unlock your iphone easily without jailbreaking. UnlockmyPhoneHQ is a official website for unlock iphone. I have used it lot of time for my iphone, go this site hope you will find your solution.

Yes, What's your current locked carrier?
Through the Remote unlocking method, You can unlock your iphone 4 without jailbreaking.Recently i unlocked my iphone by the same way. I never faced any problem. So only i recommend this one. If you are interested in this method visit http://www.unlock-zone.com/apple-iphone-4/rs5wp9/

Do you mean carrier unlock? Unlocking SIM Lock?
The best way would be the factory unlock which is PERMANENT. Please contact the original carrier of your phone, he might do that for free for you. If you do not know it, please try an IMEI checker to check it. There are several 3rd party unlockers as well, but please beware of scammers. Check the included links below.