Today we have in our hands another variance of E5577 from MTN almost similar to E5573 with LCD and increased battery strength to 3000mAh. This guide is not new; the same old boot shot method. Follow this guide you understand and wish to unlock your E5577s-321. The E5577Cs-321 and E5577s-321 use almost the same firmware files. I have tested the files on both devices. It works perfectly.
REQUIREMENTS
- Balong USB downloader
- Huawei Drivers V5.0xxx
- Huawei Firmware 21.180 (USB loader already inside)
- Huawei Firmware 21.316
- WEBUI17.1xx
GUIDE
- Install the Huawei drivers
- Disassemble and boot shot test point with and as shown (just like other boot shot already known)
- USB COM detected- you should have PC UI com port detected in device manager
- Run Balong Downloader and flash Usbloader.bin file from Huawei 21.180 firmware
- Install firmware 21.180; run setup updater to install finish
NB: LCD shows installing during firmware update process[/color
[color=#ff33ff]Your device should reboot into Factory Test Mode (FTM ) showing on screen
- Install Huawei WEBUI17; run the updater to install finish
- Install Huawei firmware 21.316
- You should see battery error on-screen at begin to resume user information; don't worry just hold the board and insert the battery gently
- It should now complete and reboot to Huawei Logo and proceed to the main interface
- Note your IMEI; read modem info with dc unlocker and write IMEI via AT command
AT^CIMEI="IMEI"
- You can now do a quick repack and insert Sim; WebUI as Usual ...........
- 3g and 4g all Working Perfect