iPhone 4 users who are still running iOS 6.1 can easily jailbreak and unlock their smartphone for free using Ultrasn0w tool. The instruction is simple and you don’t have to pay for doing this, but you unlock at your own risk only.
There is another way that we’ll mention below which is safe and guaranteed. But right now let’s talk about how to unlock iOS 6.1 iPhone 4 with Ultrasn0w 1.2.8 that also works for smartphone models 3GS and 3G. You can download the tool using Cydia. It supports baseband 01.59.00.
Users who remembered to save their old baseband during iOS 6.1 update can follow these steps to unlock for free.
iPhone 4 iOS 6.1 Unlock with Ultrasn0w Instruction
Step 1. Jailbreak your iPhone 4 with untethered Evasi0n iOS 6 - 6.1.2 tool or p0sixspwn jailbreak for iOS 6.1.3 users. Maybe you have done this already.
Step 2. Find Ultrasn0w
Cydia and download it [you can simply add http://repo666.ultrasn0w.com to your repository through Cydia – Manage –
Source - Edit]. Install the package.
Step 3. Reboot the smartphone.
Step 4. Your mobile operator network should appear on your screen. You can switch carriers with ease.
P.S. If Ultrasn0w didn’t help you there is another way to unlock iOS 6.1 iPhone 4. Use factory IMEI unlock service which works find for any baseband and any version of mobile firmware. It is fast, simple and affordable. You just need to know your IMEI code and be sure that your iPhone is locked and activated with the same carrier.
You must also find a trusted company that offers IMEI unlock service. Read reviews to be sure the service is legit and fast. Place your order online and wait till your status is changed to “unlocked” through Apple IMEI code database. Follow the guide received by email to complete unlock by connecting iPhone to iTunes.