Spreadtrum (now Unisoc) processors power millions of budget-friendly Android smartphones, tablets, and mobile devices globally. Like any Android device, these phones rely on a unique 15-digit identifier known as the International Mobile Equipment Identity (IMEI) number to connect to cellular networks.
If none of the dialer codes work, you can install or Engineering Mode Launcher from a trusted APK source (requires root access for some functions).
To help provide the most accurate software utility or specific dialer string, let me know: What is the of your phone? What Android version is it currently running?
: Restoring the device's original 15-digit code (found on the box or under the battery) to fix network connectivity issues. Changing/Altering spd android imei repair code
This article explores the methods and specialized tools to restore connectivity on your Spreadtrum/UNISOC device. Disclaimer: Legal and Ethical Usage
If your SPD Android phone has a genuine IMEI loss after a software update or reflash:
Before attempting the repair, ensure you have the following ready: To help provide the most accurate software utility
While standard dialler codes are used to the IMEI, dedicated Engineering Mode codes allow for deeper system configurations, including IMEI restoration.
Open the dialer and enter *#*#83781#*#* or *#*#3646633#*#* (these are commonly used on Spreadtrum).
On Spreadtrum/Unisoc (SPD) devices, certain codes bypass the standard user interface to trigger the or Hardware Testing menu. From this hidden menu, developers and technicians can access deep system configurations, including calibration settings for the device's baseband and modem. Common SPD Engineer Mode Codes On Spreadtrum/Unisoc (SPD) devices
Inside Engineer Mode, swipe left or right. You are looking for a tab labeled:
For modern SPD/UNISOC Android devices, dialer codes alone often cannot rewrite the IMEI due to security locks. Technicians typically use the WriteIMEI Tool