How to Activate Developer Options on Locked Devices Using Secret Codes :

- Samsung :
*#0*# or *#*#88#*#*
- Huawei :
*#*#2846579#*#*
- Xiaomi :
*#*#6484#*#*
- Vivo :
*#*#225#*#*
- Oppo :
*#899#
- Infinix :
*#*#49#*#* or *#85#
- Tecno :
*#*#49#*#* or *#85#
- Alcatel :
*#2886#
- Lenovo :
*#*#4636#*#*
- Sony :
*#*#737378423#*#*
- Motorola :
*#*#2486#*#*
- Honor :
*#*#2345#*#*
- OnePlus :
*#*#2346579#*#*