Extract Huawei E397Bu-502 Firmware 11.515.19.00.1090 on your computer
Install the Firmware update file for Huawei E397Bu-502 downloaded from Huaweiflashfiles.com
Follow the procedure for updating Firmware that is given in Package.

Huawei Flash File | Size: 16.01 MB
Version: 11.515.19.00.1090
Operator:Tricom Dominicana
Operating systems: Windows 7/8/10/XP/Vista
Huawei E397Bu-502 Firmware Download