These codes are unique to INFINIX and Tecno (both under Transsion Holdings). They may not work on other brands.
Code: *#*#83781#*#*
This opens a menu named "Engineer Mode" (different from the MediaTek one). Look for an option called "FOTA" (Firmware Over The Air). Tapping it forces the phone to check for available system updates immediately, bypassing the usual 24-hour check interval. How to Use Secret Codes on INFINIX Note 11
It is simple:
If the code doesn't work, check for typos. If nothing happens, the specific code may be blocked by your network provider. These codes are unique to INFINIX and Tecno
Code: *#*#3646633#*#*
This is the mother of all codes for your device. Once inside, you'll see tabs like: If the code doesn't work, check for typos