Does an android phone's screen light being on or off affect network status? [closed]

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For an android phone, does the screen being on or off affect the network status at all?

I am unable to run some network related USSD when phone light off or phone is locked.

Answer 1

No it doesn't effect it. Emails come through when the screen is off.

I was running a version of CyanogenMod that disconnected the WIFI when the screen was off tho but thats a custom ROM