The network unlock code is sold. After unlocking your smartphone will work with a SIM card of any operator.
The code is calculated by imei-1 sim-slot, imei-2 sim-slot. To find imei-1 (15 digits), imei-2 (15 digits), enter in the dialer * # 06 # or look at the sticker from under the battery.
The code will be provided on time from 1 minute to 1 day.