When you flash a custom ROM or experience a software crash, this NVRAM partition can become corrupted or completely wiped out. This results in an or "IMEI Unknown" status error. To restore your network signal, you must manually rewrite the original numbers—which are printed on the sticker underneath your phone's battery—back into the phone's chip registry using a specialized computer utility. Prerequisites Before You Begin
Locate the 15-digit IMEI 1 and IMEI 2 numbers printed on the box or under the battery slot.
Extract the folder and right-click on WriteIMEI.exe . Select Run as Administrator .
The Spreadtrum (now UNISOC) SC7715 is a legacy, low-cost single-core chipset designed for entry-level 3G smartphones. It manages network configurations through a dedicated system partition known as the NVRAM (Non-Volatile Random-Access Memory) or NVDATA. sc7715 imei tool download fixed
The software progress bar will turn yellow, then green, and show a or Success message.
You need to download three specific software packages to complete this repair successfully. Ensure you extract all downloaded zip files into a single, easily accessible folder on your desktop. 1. Spreadtrum SPD USB Drivers
Carefully type the original 15-digit sequences from your device hardware sticker into the input fields. Avoid entering random digits, as invalid structures will fail carrier network validation checks. Click or OK to lock in the configuration. Step 4: Establish the Hardware Connection When you flash a custom ROM or experience
Sometimes antivirus software blocks the tool from interacting with the hardware.
Go to XDA-Developers or GSM-Forum (use at your own risk). Look for a thread with:
A: Spreadtrum tools often trigger false positives because they modify low-level system partitions. Add an exception in Windows Defender. However, always verify the SHA-256 hash we provided. Prerequisites Before You Begin Locate the 15-digit IMEI
Your PC cannot communicate with an SC7715 chip in diagnostic mode without the proper hardware drivers. Download and install the official Spreadtrum USB Driver package. If you are using Windows 10 or Windows 11, you must temporarily disable before running the installer. 2. SPD WriteIMEI Tool (Fixed Version)
This article provides a comprehensive guide to finding, downloading, and using a reliable SC7715 IMEI tool to fix invalid IMEI issues securely. What is the SC7715 IMEI Tool?
The computer is missing the correct low-level USB filters, or you used an incorrect hardware boot key combination.