For all those users who don’t about Ultrasn0w and are new to iOS, Ultrasn0w is a software hack which lets you unlock your iPhone 3Gs and iPhone 4. But there are certain limitations about ultrasn0w such as it will only work with the older basebands such as 01.59.00 on iPhone 4 and 04.26.08, 05.11.07, 05.12.01, 05.13.04 and 06.15.00. So, if you have iPhone with any of these basebands, you can simply restore to iOS 6.1 using Redsn0w and Jailbreak using Evasi0n. After Jailbreaking install Ultrasn0w from the Cydia to unlock your iPhone.
If you want to permanently unlock your iPhone you can use these services.
Khmer 2014, Part 30
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Khmer 2013, Part 99
Khmer 2014, Part 20
Thai, Part 40 - End
Thai, Part 14 - End
Thai, Part 54 - End
Thai, Part 26 - End
