https://www.huaweiupdate.com/huawei-band-4-getting-1-5-0-54-update/
Huawei Band 4 getting 1.5.0.54 update with improved TruSleep and 3 new languages - HU
Apr 16, 2020 - Huawei Band 4 receiving the latest software update. The update brings version number 1.5.0.54 and has a less size of about 8.09 MB. This update optimizes the...