-You can also build your usb PC_to_Phone Cable,using S100 connector.
-If your computer have a serial port ( for example COM1), take any femal db9 connector , short circuit pin2 and pin3 and connect this "dongle" to COM port.
-Connect 105/Z107 with your USB cable ,power on it ,Windows will ask you the drivers , select the folder who contains drivers ( Z105/Z107 use same drivers).
- you should have software Winimei Version 1.16(Qualcomm write System)
- Be sure you see on screen a symbol of top screen (means you have modem on)
-Check Modem port, use the one you says ON USE
- In Winimei press Unlock
Will also solve freezing problem.
Good luck