As iphone4s can only use the lock operator SIM card activation mechanism, so one can only work on a single operator model.(Note:USA AT&T, JapanSB, Japan AU , UKO2, Sprint, Verizon) card preset 5 operator information and others using pin input method and learning cards activation to set operator information.
1.The first method: selection of preformed operators : first open the SIM card PIN code, and then insert the sim card with gevey card into the 4S, then power on the mobile phone, it will say"input the PIN to unlock", so enter the corresponding operator code, for example if is the SoftBank version, then input 0002, it will show "incorrect", then the sim had already been set to SoftBank mode, remove Gevey ultras and SIM card, close pin code, then it can be automatically unlocked.
2.The second method: Learning automatically through the activation card : first adjust the PIN code of activation card to 0000, and open the pin, put the gevey card and activation card into 4S, it will say"input PIN to unlock", then input 0000, and unlock successful, and the gevey have already been set to activation card operator model, It will be unlocked automatically when you change back to your own phone sim.
3.Third kinds of method: input MCC MNC information to self-define operators: first find the mobile phone operator of MCC MNC code, enter a phone sim card(which used to open the PIN code) and gevey into the mobile phone, after unlocking by inputting the PIN code, then enter MCC MNC. For example, Uk T-Mobile MCC MNC is 234 30, You only need to enter the 5 numbers 234 30, it will show error, then take out of the gevey, the set is complete. The gevey is working in a self-defined mode. Insert your sim card, it would be unlocked.t MCC MNC is the unified arrangement, each carrier having a fixed layout, you can search in Google. 
