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Rom HOTWAV Cosmos V4

Rom HOTWAV Cosmos V4 – Android 5.1

Firmware HOTWAV Cosmos V4 SC7731 pac file
Version: K11_HOTWAV_USR_2SIM_64+8_1+5_A5_QHD
Description: sp7731geaplus_k11_qhd_zx_64_8_dt-user 5.1 LMY47D 201604051312 release-keys
Release: sp7731geaplus_k11_qhd_zx_64_8_dt
Brand: HOTWAV – scx35_sp7731gea_k11_qhd_zx_64_8
Hardware: SP7731GEA_k11_QHD_ZX_64_8_V1.0.0


Rom *.pac fix hangon logo, logo screen freeze, remove virus, unbrick…
Gapps include – No Rooted
Language support: Multilang


Hotwav Cosmos V4


How to flash rom using SPD UpgradeTool

  • Before flashing new rom, please make a backup of your device first.
  • Download SPD Upgrade Tool and driver from here.
  • Unpack SPD Upgrade Tool.
  • Install driver Spreadtrum on PC.
  • Download and unpack ROM –> rom_firmware_abc.pac.
  • Run ResearchDownload, click on “Load packet” and add the rom_firmware_abc.pac.
  • Click on “Start”.
  • Turn off your phone, remove the battery (if the battery is removable) and replace it after some seconds (and don’t turn on the phone).
  • and connect your phone into the computer via USB data cable.
  • After flashing done, your mobile will restart automatically.
  • Finish


  • Always backup before flashing new rom.
  • Follow the instructions on how to flash the device carefully.
  • I will not take responsibility on whatever may happen to your device.
  • Make sure you are downloading the exact ROM of the device you want to flash because flashing a wrong rom or preloader, will make the device completely dead. (can’t power on, can’t charge and will not be detected by a computer).

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