The Hotwav Cosmos V8 S7358 was launched as an affordable 5.5-inch phone with dual SIM, physical navigation keys, and a classic SPD platform for African and Asian markets. Within a year, users on phone forums and YouTube repair channels began reporting “no SIM detected,” random bootloops after factory reset, frozen or lagging touchscreen, and persistent camera errors—especially after using wrong tool or firmware files. The official July 26, 2016 SPD .pac (681MB) is recognized as the last reliable recovery firmware for Cosmos V8 S7358. It restores original network calibration, fixes broken touch input, and recovers devices stuck on Hotwav logo or with Google Play/camera “not responding.” Flashing generic SPD pacs or other V8 firmware risks breaking both SIM/network and touch permanently until re-flashed with this exact board-matched file.
Hotwav Cosmos V8 S7358 SPD Firmware Details
| Device Name | Hotwav Cosmos V8 S7358 |
|---|---|
| Chipset | Spreadtrum/UNISOC (SPD) |
| Android Version | 5.1 Lollipop |
| RAM / Storage | 1GB RAM / 8GB ROM |
| Firmware Build | S7358_20160726 |
| File Size | 681MB |
| File Type | .pac (SPD Upgrade Tool/ResearchDownload) |
| Flashing Tool | SPD Upgrade Tool (ResearchDownload) |
Download Official Firmware for Hotwav Cosmos V8 S7358
Size: 681MB
Build Date: July 26, 2016
Chipset: SPD/UNISOC
Android Version: 5.1 Lollipop
Download Link: MediaFire Direct Link
Why Flash This Specific Firmware?
- Regain Working SIM/Network Immediately: Owners reported “network not found” or blank SIM slots after updates or using other Cosmos pacs. This package restores NVRAM, modem, and all network bands in one flash.
- Fix Touchscreen Malfunction or Dead Zones: Only this S7358 .pac reliably brings back full touch—generic SPD files can leave devices with part or all of the screen not responding.
- Cure Bootloops, Startup Crashes, and Logo Freeze: After reset or failed app update, many V8s became stuck on the Hotwav logo. This firmware fully rebuilds boot/system and all drivers for stable Android setup.
- Restore Camera Function for Local (S7358) Hardware: Many user complaints were “camera cannot open” after the wrong update; this release re-flashes main/front camera HAL and returns picture capture/save to normal.
- Repair Google Play/App Crash “Has Stopped” Errors: Reset Play Services and app permissions are included, fixing “Google Play not responding” or constant crash alerts for users after failed partition or partial update.
How to Flash the Firmware
SPD Upgrade Tool / ResearchDownload steps:
- Extract zip. Run ResearchDownload, load pac file from folder.
- Click Start Downloading (arrow icon). Power off phone, hold Volume Down, browse USB to connect (hold through initial flash).
- Wait (about 8–11 min), green “Passed” confirms flash. Power on, check SIM, screen, camera, Google Play function.
Full SPD flashing visual guide: How to Use the SPD Upgrade Tool to Flash Your Smartphone
