Samsung SM-G991B
Samsung SM-G991B is a Samsung firmware file listed under Samsung, distributed as SM-G991B_G991BXXU4CVB8_G991BOWO4CVB8_ZTO_4file.zip with a download size of 6.61 GB. It was published on June 16, 2026. It is available to download free of charge. Before flashing, verify the file matches your exact device model and back up your data.
About Samsung SM-G991B
Looking for the official stock firmware for your Samsung SM-G991B? You're in the right place. Below is the original Samsung flash file you need to restore your device, whether you're fixing a software issue or starting fresh. It can rescue a bricked handset, fix IMEI or baseband errors, and give the Samsung SM-G991B a fresh start without the clutter that builds up over time. File Name: SM-G991B_G991BXXU4CVB8_G991BOWO4CVB8_ZTO_4file.zip File Size: 6.61 GB Before flashing, back up your data (the process wipes the device), charge above 50 percent, and install the correct USB drivers on your computer. After flashing, allow a few minutes for the first boot. From there the Samsung SM-G991B should run like a brand new unit.
File Details
| File name | Samsung SM-G991B |
|---|---|
| Package | SM-G991B_G991BXXU4CVB8_G991BOWO4CVB8_ZTO_4file.zip |
| Brand / Platform | Samsung |
| Category | Samsung |
| File size | 6.61 GB |
| Date added | June 16, 2026 |
| Price | Free |
How to use this file
- Confirm Samsung SM-G991B matches your exact device model and that it is intended for Samsung hardware.
- Back up your personal data, as flashing firmware can erase the device.
- Download the file (6.61 GB) using the button above.
- Use the appropriate flashing tool for your platform and follow the on-screen steps.
- Keep the device charged and connected until the process completes.
Frequently asked questions
Is Samsung SM-G991B free to download?
Yes, Samsung SM-G991B can be downloaded free of charge from this page.
How large is the download?
The Samsung SM-G991B package is 6.61 GB.
Which devices is this firmware for?
This file is intended for Samsung devices. Always confirm it matches your specific model before flashing.