I have already shared the unlocking solution and firmware links of the Huawei E5578 4G LTE Cat4 router. So many latest firmware is available here, including E5830. We have also uploaded some more firmware, which might be useful for you. Make sure we provide every firmware for absolutely free, and I only charge for unlock code.
Huawei E5878s-32 Firmware 21.298.03.00.00 (general)
Huawei E8131s-2 Firmware 21.157.99.14.00 (Universal)
Huawei E5383 Firmware 21.298.99.61.00 (general)
Huawei E5756s 2 Firmware 22.146.19.00.00 (general)
Huawei E5383 Firmware 21.298.99.07.00 (Universal)
Huawei E5377s-327 Firmware 21.292.99.10.00 (general)
Huawei E5338 Firmware 21.210.07.00.00 (general)
Huawei E5330Bs-6 Firmware 21.210.19.00.00 (general)
Huawei E5180s-517 Firmware 21.270.25.00.00 (general)
Huawei E5170s-22 Firmware 21.236.17.00.00 (general)
AIRTEL E3372 ORIGINAL DASHBOARD
Huawei E5377 WebUI 17.100.09.00.0 (general)
Before proceeding with any firmware, I want to tell you something. Any wrong firmware can make your device dead, and the admin is not responsible. Also, while updating the firmware, it may ask you password/firmware code. You can generate the firmware for your IMEI here.
Want firmware code-free, then leave a comment with model and IMEI. It will be updated within 8 hrs.
Keep visiting routerunlock.com for more firmware and unlocking solutions.