Question [Q] Cannot access the service menu

Hello guys,

I cant access the service menu on my phone.

tried 3845#*970# which didn't work. Tried 910-990, nothing worked. I'm unaware if it's the problem with the custom rom I'm running on. On slimBean. It worked once with stock ROM but since I moved to custom ROMs, it never worked. Any clues on what could be the issue?