Advan S50 4G
Advan S50 4G is a Advan firmware file listed under Advan, distributed as Advan_S50_4G_SC9850KL_V1.0_20180614_8.1_CPB.zip with a download size of 750 MB. It is built for the Unisoc (Spreadtrum) SC9850K chipset and runs Android 8.1 (Oreo), with a firmware build date of June 14, 2018. It is flashed with SPD ResearchDownload (or UpgradeDownload). It was published on June 16, 2026. This page has been viewed 20 times. It is available to download free of charge. Before flashing, verify the file matches your exact device model and back up your data.
About Advan S50 4G
If your Advan S50 4G has been giving you trouble, reinstalling the stock firmware is often the cleanest fix. Here you'll find the full Advan flash package along with the details to check before you begin. It fixes random reboots, crashing apps, a phone stuck on the splash screen, or a botched OTA update, and removes leftover bloat by returning the Advan S50 4G to factory condition. File Name: Advan_S50_4G_SC9850KL_V1.0_20180614_8.1_CPB.zip File Size: 750 MB Back up your files, charge the Advan S50 4G past 50 percent, install the matching drivers, and only then begin. With the stock ROM back in place, the Advan S50 4G returns to factory state. If something fails, verify the file matches your model and retry.
File Details
| File name | Advan S50 4G |
|---|---|
| Package | Advan_S50_4G_SC9850KL_V1.0_20180614_8.1_CPB.zip |
| Brand / Platform | Advan |
| Category | Advan |
| Chipset | Unisoc (Spreadtrum) SC9850K |
| Android version | Android 8.1 (Oreo) |
| Build date | June 14, 2018 |
| Flash tool | SPD ResearchDownload (or UpgradeDownload) |
| Package format | ZIP archive |
| File size | 750 MB |
| Date added | June 16, 2026 |
| Price | Free |
How to flash Advan S50 4G with SPD ResearchDownload
- Confirm Advan S50 4G matches your exact device model and that the phone uses the SC9850K chipset.
- Back up your personal data, as flashing firmware can erase the device. Charge the battery above 50%.
- Download the file (750 MB) using the button above and extract it on a Windows PC.
- Install the SPD / Unisoc USB drivers, then open SPD ResearchDownload (or UpgradeDownload).
- In the tool, load the .pac firmware file from the extracted folder.
- Start the flash, then press Start in the tool, then connect the powered-off phone while holding Volume Down (boot key).
- Wait for the success message before disconnecting. Leave "Erase NV" unticked unless you intend to wipe IMEI and calibration data.
Guides for this firmware
- Flashing .pac Files with SPD ResearchDownload GuideSPD ResearchDownload (also known as UpgradeDownload) is a specialized flashing tool used to install stock firmware on devices powered by Unisoc (Spreadtrum) chipsets. It is primarily used to unbrick…
- How to Use SPD ResearchDownload: Firmware Flashing GuideSPD ResearchDownload (also known as UpgradeDownload) is a specialized flashing tool used to install stock firmware on devices powered by Unisoc (Spreadtrum) chipsets. It allows technicians and users…
Frequently asked questions
Is Advan S50 4G free to download?
Yes, Advan S50 4G can be downloaded free of charge from this page.
How large is the download?
The Advan S50 4G package is 750 MB.
Which tool do I need to flash Advan S50 4G?
Advan S50 4G is Unisoc (Spreadtrum) SC9850K firmware, so it is flashed with SPD ResearchDownload (or UpgradeDownload) using the .pac firmware file.
What Android version is Advan S50 4G?
This firmware is Android 8.1 (Oreo), built on June 14, 2018.
Which devices is this firmware for?
This file is intended for Advan devices. Always confirm it matches your specific model before flashing.