On Android or PC, EKA2L1 requires a "device dump" (firmware) to function. You can technically use a custom ROM dump instead of a stock one to enjoy the pre-applied patches. How to Set Up the "Cracked" Experience
EKA2L1 is a multi-platform Symbian OS emulator.It emulates the EPOC32 architecture used by Nokia devices.The software mimics the hardware of S60v1, S60v3, and S60v5 phones.It also supports Symbian^3, the operating system powering the Nokia N8.
Which (Windows, Android, etc.) you are running EKA2L1 on. If you are trying to run a specific game or application .