Buy Multi-Networks R-SIM III 3+C Turbo Sim Uulock For iPhone4S GSM WCDMA CDMA

Instructions for ATT: Turn off your iphone 4s, insert the r-sim 3 with the activated sim card you want to use, turn iphone on and wait 2-3 minutes max for signal.

Support IOS 5.1 and below, support 2.0.12 baseband and below, Using F981 chip, High-quality micro Simcard tray! Integration of the 26 state carriers, Automatic unlocking, only need to select an operator,not call 112!
R-SIM 3+C Ver. for iPhone 4S
• Rebel4S™ True Plug-and-Play Unlocking SIM Interposer
• No Need to Dial International Emergency Number 112
• Untethered Unlock with no Jailbreak Required
• Compatible with all iPhone 4S SIM Cards
• Complete Unlock with all 2G and 3G data services
• Works on iOS 5.0 / 5.0.1 / 5.1/ 5.1.1 (iPhone 4S GSM, ie AT&T)
• Works on iOS 5.0 / 5.0.1  (iPhone 4S CDMA, ie VERIZON, SPRINT) (needs to be jailbroke)
• Full compatible Baseband 1.0.11 / 1.0.13 / 1.0.14 / 2.0.10 / 2.0.12
• Guaranteed Better Reception than Previous
• Decreased Power Consumption
• NO cutting
TMobile users are suggested to use a 128k 4g microsim
For iPhone 4S only. 

Put in R-SIM,Show:"Activation Required",Unable to activate.Solution:

1,Don't put in any simcard to your iphone,Turn off your iphone,Turn on your iphone;
2,Open "Voice memos",Click recording butten,start recording;
3,Press the home button,back home now
4,Put in R-SIM and SimCard and R-SIM Tray to your iPhone
6,If show: "Activation Required",click Status bar "Recording",in to "Voice memos",press the home button,Back home
7,Click Settings>>Phone>>SIM Applications>>Entering the R-SIM program list,Select carrier
8,If this operation is invalid, please repeat this procedure

Overall Management of Apple Devicess Software download:iTools