To use this tools and generate unlock code, you should have downgrade your modem firmware version to version 21.xxx……(for example Huawei_E3372h-153_21.180.01.00.00 for Huawei E3372h) if you have a version 22.xxx… version firmware.This version of the V4 calculator, as opposed to older versions, can directly generate pattern 1 and 2 codes(hash) which are required for calculating the unlock code.
