The available firmware is for Huawei E5573s-856 then you can use it but if available firmware is for Huawei E5573Bs-320 then you cannot use it with E5573s-320 because it may or may not work due to its hardware specs difference.
Suppose you have modem Huawei E5573s-320 and generic firmware is not available for it. How to Choose a suitable firmware for your modem that will definitely work for it. Huawei Dongle, Wingle, Wifi Hotspot, Mifi Cloud, CPE Router, Pocket Wifi Router, etc. This method of firmware update is nearly same for all Huawei broadband internet device i.e. In this article, we will guide you from where to download and which firmware will exactly work on our modem. After going through and following the below instructions, you will be able to choose right firmware for your modem that is compatible with your modem and will 100% work with your device. There are a lot of reasons, we need to update our modem firmware but most of the people are newbie in this field and they don not even know from where to download firmware files and which firmware file is suitable for their modem.
How to Update or Flash Huawei Modem Firmware