But the 3rd generation of R-SIM III solves this problem. Now you can use R-SIM interposer to unlock yout iPhone 4S running on iOS 5.1 easily. The R-SIM III currently supports iphone 4S with baseband 1.0.11, 1.0.13, and 1.0.14 on iOS 5.0 or iOS 5.0.1. Now the iOS 5.1 and baseband 2.0.10 support has been added to it.
The features of R-SIM III are as below:
- New packaging
- Using F300 chip
- High-quality micro Sim tray
- Integration of the 26 Country carriers, other countries' carrier codes can be added manually.
- Rebel4S™
- True Plug-and-Play Unlocking SIM Interposer
- No Need to Dial International Emergency Number 112
- No Jailbreak Required
- Compatible with all GSM/WCDMA/CDMA iPhone 4S SIM Cards
- Complete Unlock with all 2G and 3G data services
- Works on iOS 5.0 / 5.0.1 / 5.1
- Full compatible Baseband 1.0.11 / 1.0.13 / 1.0.14 / 2.0.10
- Guaranteed Better Reception than previous versions.
- Decreased Power Consumption
You can order and get more information here