Download ZTE Blade A612 official firmware from the link here, and follow the provided flashing instructions to learn how to flash the stock rom.
If you notice that any of the links provided below is broken or doesn’t work, please post in comments section so we fix and update it ASAP.
Download Options
File Name: ZTE_BLADE_A612_SDCARD_SOFTWARE_PACKAGE.zip
Size: 1.41 GB
ROM Version: v7.0
Firmware – Download
File Name: ROM_BLADE A612_SDCARD_SOFTWARE_PACKAGE.zip
Size: 1.41 GB
ROM Version: v7.0
Region: Spain
Firmware – Download
File Name: 20180130093054500.zip
Size: 1.33 GB
Region: Bosnia
Build: 346760B0507TLC_BA_BA612_V5.0
Firmware – Download
File Name: 20170906151304340.zip
Size: 1.40 GB
Region: Egypt
Build: 336270B0392GEN_EG_BA612_V2.0
Firmware – Download
File Name: 20171211104422563.zip
Size: 1.48 GB
Region: Malaysia
Build: 344050B0552MAX_MY_BA612_V3.0
Firmware – Download
File Name: 20180104172232536.zip
Size: 1.39 GB
Region: Peru
Build: 334860B0979ENT_PE_BA612_V3.0
Firmware – Download
File Name: 20180817110133478.zip
Size: 1.47 GB
Region: Poland
Build: 353320B0736GEN_EEU_BA612_V3.0
Firmware – Download
File Name: 20171228175713328.zip
Size: 1.53 GB
Region: South Africa
Build: 345090B0501CLL_ZA_EMPIRE_E8_V5.0
Firmware – Download
File Name: 20180817095439391.zip
Size: 1.40 GB
Region: Spain / Global
Build: 353350B1983GEN_EU_BA612_V9.0
Firmware – Download
How to flash
Click here to view complete flashing instructions for any of the above firmware packages. If you have any issue with flashing, post in comments section below for assistance.