Mobiistar Prime X is an early Mobiistar Android smartphone based on the MediaTek MT6592 octa‑core platform. The V12 20150518 firmware package listed here is a stock SP Flash Tool ROM intended for restoring the original software on this model after bootloops, failed mods, or system corruption.
Because this is an older MT6592 device, using the correct scatter firmware and tool is important to avoid preloader or NVRAM issues during recovery.
Mobiistar Prime X Firmware Details
| Field | Information |
|---|---|
| Device Name | Mobiistar Prime X |
| Model Identifier | Prime X (MT6592 family; specific regional sub‑model not specified in filename) |
| Codename | Not publicly documented / not confirmed |
| Chipset / Platform | MediaTek MT6592, 32‑bit octa‑core SoC (EMMC storage with scatter layout) |
| Launch Android Version(s) | Shipped on Android KitKat generation; later Lollipop build exists as a separate “PRIME_X‑Lollipop‑V02” ROM. |
| Current Firmware Line | Stock Mobiistar Android (pre‑Lollipop line; this V12 build precedes the Lollipop V02 firmware) |
| Firmware Type | Scatter‑based stock ROM (ZIP archive containing MT6592 Android scatter file and partition images) |
| Flashing Tool | SP Flash Tool (standard MTK preloader/download mode) |
| Bootloader Requirement | Intended for service flashing on locked stock bootloader via preloader/DA connection; no end‑user OEM unlock flow documented. |
| Region / Branch Notes | Belongs to the “Mobiistar Prime X” line; filename and known collections do not encode region, so cross‑flashing to different Prime X generations or Plus variants is unsupported. |
| Typical File Size Range | This package: 657 MB ZIP archive |
| Scatter / Package Contents | MT6592 EMMC scatter layout with partitions such as preloader, boot, recovery, system, cache, and userdata suitable for SP Flash Tool “Download” / “Firmware Upgrade”. |
| Verification Note | Flashing tool family verified via external references for this exact filename. |
⚠️ Flashing Risks & Disclaimer
Flashing a MediaTek MT6592 scatter ROM with SP Flash Tool can cause permanent damage if the wrong firmware or preloader is used, including loss of IMEI/NVRAM and devices that no longer respond in normal preloader mode. Only proceed if the device is confirmed to be Mobiistar Prime X and the full package matches this model; always back up NVRAM where possible before flashing.
The firmware package and all associated trademarks remain the property of their respective owners and are shared here solely to help restore legitimately owned devices to working software condition.
Download Official Firmware for Mobiistar Prime X
This stock ROM is preserved via third‑party mirrors and firmware collections because original public Mobiistar hosting for Prime X has effectively disappeared. This package is an original stock ROM mirrored for preservation, as the manufacturer no longer provides public downloads for this model.
| Region / Variant | Filename | Build / Version | Android / Firmware Version | File Type | Build Date | File Size | Download Link |
|---|---|---|---|---|---|---|---|
| Mobiistar Prime X MT6592 | Mobiistar_Prime_X_MT6592_V12_20150518.zip | V12 20150518 | Stock KitKat‑generation ROM line (pre‑Lollipop; see separate Lollipop V02 build for upgrade) | ZIP (SP Flash Tool scatter package inside) | 2015‑05‑18 (from filename tag 20150518) | 657 MB | Download V12 20150518 (MediaFire mirror) |
Flashing Requirements
- Windows PC recommended, as SP Flash Tool builds for MT6592 are most frequently documented and supported on Windows.
- SP Flash Tool installed (a version compatible with legacy MT6592 scatter firmware) and MediaTek VCOM/Preloader USB drivers properly configured.
- Good quality USB cable and a stable USB port (preferably on the back panel of a desktop PC) to reduce disconnection risk during flashing.
- Battery charged to at least 40–50% to minimize the chance of the phone powering off mid‑flash.
- Backup of user data and, where possible, NVRAM/NVDATA partitions, because full “Firmware Upgrade” or broad “Download Only” operations can erase user data and radio configuration.
- Confirmation that the device is Mobiistar Prime X (MT6592) and not Prime X Grand / Prime X Plus, by checking printed model references and SoC information.
How to Flash the Firmware
- Download the Mobiistar_Prime_X_MT6592_V12_20150518 firmware ZIP and extract it on the PC, then verify that an MT6592 Android scatter file and image files (preloader, boot, recovery, system, etc.) are present.
- Install MediaTek VCOM/Preloader USB drivers and open SP Flash Tool, then use the “Scatter‑loading” button to select the MT6592 scatter file from the extracted firmware folder.
- Select the desired mode in SP Flash Tool: “Download Only” for targeted recovery or “Firmware Upgrade” for a more complete system refresh, taking care with the preloader checkbox if device compatibility is uncertain.
- Power off the Mobiistar Prime X, disconnect and reconnect it to the PC via USB, and click “Download” in SP Flash Tool so the device is detected in preloader mode and flashing begins.
- Wait until SP Flash Tool reports a successful operation, then disconnect the cable and boot the phone; initial startup may take several minutes while Android rebuilds cache and optimizes apps.
For a detailed walkthrough of SP Flash Tool usage on MediaTek devices, refer to this external guide: How to flash MediaTek firmware with SP Flash Tool.
Frequently Asked Questions (FAQs)
Can this V12 20150518 firmware be used on Prime X Grand or Prime X Plus?
No, this package targets the original Mobiistar Prime X with MT6592 and is not suitable for Prime X Grand (MT6753) or Prime X Plus; flashing across these models can cause serious boot or radio issues.
Does flashing this ROM upgrade the phone to Lollipop?
No, this is a V12 KitKat‑line firmware from May 2015; the Lollipop firmware is a separate “Mobiistar‑PRIME_X‑Lollipop‑V02” build and is not included in this package.
Is an unlocked bootloader required on Mobiistar Prime X?
No, SP Flash Tool operates through the MTK preloader/DA connection and is intended for use on standard locked Prime X units used in service environments.
What are the main MT6592‑specific risks during flashing?
On MT6592 devices, flashing an incorrect preloader or mismatched scatter layout can prevent normal preloader detection, and improper handling of NVRAM/SEC_RO may lead to lost IMEI and network issues.
Is the MediaFire link an official Mobiistar server?
No, the MediaFire URL is a third‑party mirror used to preserve the original Mobiistar Prime X firmware because the vendor’s own distribution endpoints are no longer accessible.
Can this ROM fix bootloops after a failed root or custom recovery?
A full flash of the stock V12 firmware (including system and boot partitions) can often resolve software‑induced bootloops on a genuine Prime X MT6592, provided the hardware matches this model.
