The Mobiistar X1 Dual is a budget dual‑SIM smartphone for the Indian market, featuring a 5.7‑inch HD+ display, 3 GB RAM, 32 GB storage, and a MediaTek MT6737T quad‑core chipset running Android 8.1 Oreo. This model is commonly used as an entry‑level daily phone or secondary device, where issues like failed OTAs, app overload, and rooting experiments can cause bootloops, FRP locks, or performance degradation.
Installing the correct India‑specific stock firmware (Mobiistar_X1_Dual_MT6737T_IN_V1.11_07182018) can help recover from software faults, restore factory settings after custom modifications, and address issues such as stuck boot or unstable updates, though complete resolution is not assured.
Mobiistar X1 Dual Firmware Details
| Field | Details |
|---|---|
| Device Name | Mobiistar X1 Dual (India budget dual‑SIM phone) |
| Model Identifier | X1 Dual, 3 GB RAM / 32 GB storage (expandable via hybrid microSD) |
| Codename | Referenced as X1_Dual / MT6737T_IN in firmware builds (V1.11_07182018 India variant) |
| Chipset / Platform | MediaTek MT6737T (quad‑core Cortex‑A53 at 1.3 GHz, Mali‑T720 MP2 GPU) |
| Launch Android Version | Android 8.1 Oreo |
| Current Firmware Line | Stock Android 8.1 Oreo India (IN) ROM line, V1.11 build dated 18 July 2018 (Mobiistar_X1_Dual_MT6737T_IN_V1.11_07182018) |
| Typical File Size Range | Approx. 1.2–1.5 GB compressed for full SP Flash Tool packages; this package is about 1.32 GB. |
| Firmware Type | Scatter‑based stock ROM for SP Flash Tool (MT6737T platform, India region) |
| Flashing Tool | SP Flash Tool (Smart Phone Flash Tool) for MediaTek devices |
| Bootloader Requirement | Flashes via MTK preloader interface; generally works with the standard locked bootloader without fastboot OEM unlock. |
| Region / Branch Notes | India (IN) specific variant with MT6737T; cross‑flashing Dubai or other region builds or non‑X1 Dual MT6737T ROMs is unsafe due to modem and band differences. |
⚠️ Flashing Risks & Disclaimer
Flashing this model carries risks due to the Mobiistar X1 Dual’s MT6737T platform, which includes region‑specific modem bands for Indian networks and tightly coupled display/camera drivers. Using a Dubai variant (e.g., V1.22) or firmware from another MT6737T device can cause no signal, incorrect LTE bands, or boot failures.
SP Flash Tool “Format all + Download” operations can erase NVRAM, IMEI, and radio calibration, leading to “invalid IMEI” errors and total loss of telephony until restored. Power interruptions or driver issues during preloader flashing may corrupt the boot chain, especially on budget hardware prone to USB instability.
This firmware package is intended solely for restoring original software on the Mobiistar X1 Dual for legitimate owners. ROM images, trademarks, and assets remain the property of their rights holders; no modification or copyrighted content redistribution is claimed or encouraged.
Download Official Firmware for Mobiistar X1 Dual
This package is an original stock ROM mirrored for preservation, as the manufacturer no longer provides public downloads for this India V1.11 build.
| Region / Variant | Filename | Build / Version | Android / Firmware Version | File Type | Build Date | File Size | Download Link |
|---|---|---|---|---|---|---|---|
| India (IN) Mobiistar X1 Dual | Mobiistar_X1_Dual_MT6737T_IN_V1.11_07182018.zip | Mobiistar_X1_Dual_MT6737T_IN_V1.11 (India stock build) | Android 8.1 Oreo stock ROM for Mobiistar X1 Dual (MT6737T IN) | Compressed SP Flash Tool scatter package (.zip; includes MT6737T scatter and images) | 18 July 2018 (V1.11 branch) | ≈ 1.32 GB (compressed archive) | Download India V1.11 stock ROM (Google Drive mirror) |
Flashing Requirements
- PC & OS: A Windows PC (Windows 7 or later recommended) with administrator access to install MediaTek USB VCOM drivers for the Mobiistar X1 Dual.
- Drivers & Tools: Install MTK USB VCOM/Preloader drivers and download a compatible SP Flash Tool version for MT6737T devices.
- Firmware Package: Use only India (IN) V1.11 builds explicitly for the Mobiistar X1 Dual MT6737T; avoid Dubai V1.22 or other MT6737T ROMs due to region‑specific modem bands.
- Bootloader & USB: SP Flash Tool uses the preloader interface, so standard locked bootloader devices are supported; USB debugging is not needed if the phone is off.
- Battery & Cable: Charge to at least 40–50% and use a stable USB cable to prevent interruptions during flashing.
- Backup & Data Loss: “Firmware Upgrade” or “Format all + Download” can wipe apps, settings, and NVRAM (IMEI, radio data); back up critical files and record IMEI beforehand.
- Device Verification: Verify the model is Mobiistar X1 Dual with MT6737T, 3 GB RAM, 32 GB storage, and India bands using system info or printed labels.
How to Flash the Firmware
- Download and extract the IN V1.11 ROM: Download the Mobiistar_X1_Dual_MT6737T_IN_V1.11_07182018.zip package and extract it to reveal the MT6737T scatter file and partition images for SP Flash Tool.
- Install drivers and SP Flash Tool: Install MediaTek USB VCOM drivers for the Mobiistar X1 Dual, then download and extract SP Flash Tool and launch it with administrator privileges on Windows.
- Load the MT6737T scatter file: In SP Flash Tool, select the “Download” tab and load the MT6737T_Android_scatter.txt from the extracted directory, confirming partitions like preloader, boot, system, and modem are mapped correctly for the India V1.11 build.
- Connect the powered‑off phone: With the Mobiistar X1 Dual off, click “Download” (or “Firmware Upgrade” for full restore) in SP Flash Tool, then connect via USB and wait for preloader detection to begin flashing.
- Wait for first boot and verify: After SP Flash Tool completes successfully, disconnect and power on; the first Android 8.1 Oreo boot can take several minutes, after which network (India bands), fingerprint, and dual‑SIM functionality should be checked before app reinstallation.
For a detailed SP Flash Tool guide on MediaTek devices, see: SP Flash Tool Mediatek firmware flashing guide.
Frequently Asked Questions (FAQs)
Is this firmware specific to the India (IN) variant of Mobiistar X1 Dual?
Yes. The V1.11_07182018 build is for the MT6737T India region with local LTE bands; flashing Dubai or other region ROMs may result in no signal or incorrect network compatibility.
Can this stock ROM fix a Mobiistar X1 Dual stuck after a failed OTA or root?
Restoring the full India V1.11 stock ROM via SP Flash Tool can often recover phones with bootloops or instability from interrupted updates or rooting, assuming no hardware storage failure.
Why does IMEI disappear after flashing the X1 Dual?
NVRAM formatting or overwrite during flashing erases IMEI and modem calibration for the MT6737T, causing “no service” until restored with specialized tools.
Can this firmware be used on other MT6737T phones?
No. Region and model‑specific drivers (e.g., for India bands and X1 Dual fingerprint/camera) make cross‑flashing with non‑X1 Dual MT6737T ROMs unsafe.
