Home > Iphone > Unlock i4s SoftBank carrier IOS 8.1.2 & fix ussd services

Unlock i4s SoftBank carrier IOS 8.1.2 & fix ussd services

Here the step by step to unlock my iPhone 4S 32G SoftBank carrier IOS 8.1.2 and fix ussd services (ex: to check current balance with command *111# or Internet quota *123#)

  1. Purchase R-sim 9 Pro
  2. Check whether it worked on current iOS version (in my case it worked with ios 5.1.1)
  3. Download & Install the latest iTunes version
  4. Backup iphone data with iTunes
  5. Update current ios version to ios 8.1.2 with iTunes  (need to RESTORE & update if device has been jailbreak before)
  6. Just cancel if there is “carrier settings update” popup
  7. Download & jailbreak with TaiG v1.2.0 (check cydia & uncheck 3K Assistant options)
  8. Reboot
  9. Run cydia and add following repo
  10. Search and Install “CommCenter patch for iOS 7” & “iFile”
  11. Run iFile and go to folder /System/Library/Carrier Bundles/iPhone/Default.bundle/
  12. Select on carrier.plst and select “Property List Viewer”
  13. Scroll down and find the item “SupportsSupplementaryServicesOver3GPP” And turn it “On”
  14. Reboot
  15. Test
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