Q1. My BLU Vivo One Plus suddenly shows "No Service" and I can't make calls. Will this firmware fix it?

This is the most common and critical problem with this model. Flashing the stock ROM is the best first step, as it will fix a corrupted modem firmware (baseband). If the problem persists after flashing, it means your phone's unique IMEI number has been erased, which this firmware cannot restore.

Q2. I am worried about viruses or ads on my BLU phone. Is this firmware clean?

Yes. This is the official stock firmware from the manufacturer. Flashing it completely overwrites the phone's software, removing any third-party apps, adware, bloatware, or malware that may have been installed, returning it to its original factory state.

Q3. The Face Unlock feature has disappeared or stopped working. How can I get it back?

This is a known software glitch. The Face Unlock feature depends on specific system services and drivers. A full firmware reflash will restore all of these original components, which should make the feature reappear in the security settings menu.

BLU Vivo One Plus (V0290WW) Firmware (Stock ROM)

The BLU Vivo One Plus (V0290WW) is a budget-friendly smartphone from 2018 that offered a large 6.0-inch 18:9 display and features like Face Unlock, which were modern for its time. It runs on Android 7.1.1 Nougat. However, this model is infamous for a critical software flaw that causes it to suddenly lose all network connectivity, permanently displaying a “No Service” error. Other user-reported issues include problems with the Face Unlock feature and concerns about pre-installed bloatware. Flashing the official stock firmware is the primary method to attempt a fix for these software-driven problems and restore the device.

⚠️ CRUCIAL WARNING: “No Service” and IMEI Information
The most common problem with this phone is the loss of network service. Flashing firmware can fix this if the modem software is corrupt. However, if your phone’s unique IMEI number has been erased, this firmware will not restore it. To protect your IMEI, always use “Download Only” mode in SP Flash Tool. This process will also erase all your personal data.

⚠️ Prerequisites: Before You Begin

Click Here for the Essential Pre-Flashing Checklist

Backup Your Data: All your personal information, apps, and files on the phone’s internal storage will be permanently wiped.
Charge The Battery: To prevent the phone from shutting down, ensure the battery has at least a 50% charge before you begin.
Windows PC & USB Cable: You will need a Windows computer and a standard micro USB cable.

📱 Quick Device Specifications

Device: BLU Vivo One Plus
Model: V0290WW
Chipset: MediaTek MT6737M
Display: 6.0″ HD+ IPS (1440×720)
Operating System: Android 7.1.1 Nougat
RAM: 2GB
Storage: 16GB
Battery: 3000 mAh

🛠 Required Tools & Downloads

File / Tool	Download Link
SP Flash Tool	Download Tool
MediaTek USB VCOM Drivers	Download Drivers

⬇️ BLU Vivo One Plus Stock ROM / Firmware

Build Date	Android Version	Chipset	Download Link
2018-03-27	7.1.1 Nougat	MediaTek MT6737M	Download (MediaFire)

⚡ Quick Flashing Guide

Download and install the MediaTek VCOM drivers on your computer.
Extract the firmware ZIP file (Blu_Vivo_One_Plus_...zip) and the SP Flash Tool.
Launch flash_tool.exe. Click the “Scatter-loading” button and select the MT6737M_Android_scatter.txt file from the extracted firmware folder.
Crucially, ensure the flashing mode is set to “Download Only.” This helps protect your IMEI data. Click the green “Download” button.
Power off your phone completely. Connect it to the PC via USB cable. The flashing process should start automatically.
Once you see a green checkmark pop-up, the process is complete. You can now disconnect the phone and power it on.

For a more detailed, step-by-step guide on this process, please refer to our main tutorial:
👉 Full Tutorial: How to Flash MediaTek Firmware with SP Flash Tool

❓ Frequently Asked Questions (FAQs)

Q1. My BLU Vivo One Plus suddenly shows “No Service” and I can’t make calls. Will this firmware fix it?: This is the most common and critical problem with this model. Flashing the stock ROM is the best first step, as it will fix a corrupted modem firmware (baseband). If the problem persists after flashing, it means your phone’s unique IMEI number has been erased, which this firmware cannot restore.
Q2. I am worried about viruses or ads on my BLU phone. Is this firmware clean?: Yes. This is the official stock firmware from the manufacturer. Flashing it completely overwrites the phone’s software, removing any third-party apps, adware, bloatware, or malware that may have been installed, returning it to its original factory state.
Q3. The Face Unlock feature has disappeared or stopped working. How can I get it back?: This is a known software glitch. The Face Unlock feature depends on specific system services and drivers. A full firmware reflash will restore all of these original components, which should make the feature reappear in the security settings menu.

🔧 Device Troubleshooting

After flashing, I still have “No Service” or an “Invalid IMEI” error: This unfortunately confirms that your NVRAM partition, which stores your IMEI, is corrupt or erased. This is a common failure point on this specific model that a standard firmware flash cannot repair. Restoring the IMEI requires advanced tools and methods.
SP Flash Tool shows a BROM ERROR or the phone is not detected: This is a driver issue. Ensure the MediaTek VCOM drivers are correctly installed (you may need to disable Windows driver signature enforcement). Use a good quality USB cable and a main USB port on your PC. Make sure the phone is completely powered off before connecting it.
The phone is stuck on the BLU logo after a successful flash: The first boot after flashing can take 10-15 minutes. If it remains stuck, boot into recovery mode (Power + Volume Up), use the volume keys to navigate to “Wipe data/factory reset,” and select it with the power button. This will resolve any data conflicts.