Green spot coming on display while using front camera

You are not speaking with anyone from Apple here. This is a user to user only forum. Take it back to the store you bought the phone and show it to them.

I did a screen shot of your post. Is the green dot inside the red circle? If so, it’s the shadow of a dust particle in your lens. There is nothing to be done. The camera module would possibly need to be replaced.

I see multiple spots and they are all dust particles on the surface of the camera sensor. The sensor is covered by glass plates that cut UV and IR and may contain an anti-alias filter, but I doubt it.

The dust accumulates on the surface of the chip because when the chip is active, it creates a charge that attracts dust. Humidity is a factor.

Light entering the lens is not quite in focus as it hits the glass plate filter and neither is the dust. Unfocused light can’t resolve the dust as a sharp object and it appears on the pixel(s) as a grey shadow.

If you bought it under those terms, then there is nothing you can do.

Apple would never sell phones under those conditions, you did not buy this from an Apple store.

Not bad at all if that’s the only issue. But definitely not something Apple can assist with beyond replacing the camera. But a dust spot or two is a nonissue for me.

Again, this is a user to user only forum. No one here can help you. If you bought it knowing no returns, then you have your answer. Sometimes deals which are too good to be true, aren't good deals.

I see multiple spots and they are all dust particles on the surface of the camera sensor. The sensor is covered by glass plates that cut UV and IR and may contain an anti-alias filter, but I doubt it.

The dust accumulates on the surface of the chip because when the chip is active, it creates a charge that attracts dust. Humidity is a factor.

Light entering the lens is not quite in focus as it hits the glass plate filter and neither is the dust. Unfocused light can’t resolve the dust as a sharp object and it appears on the pixel(s) as a grey shadow.

The issue is it’s a textured wall and as soon as I zoom in, every bump in the wall has a shadow.

The way to see dust spots is to take an overexposed photo (+5 stops or more) of a plan blue sky. If the lens has a variable aperture, stop it down to f/16. The dust spots pop off the screen then.

At f/16 or higher the depth of focus is enough to almost resolve the dust and they appear almost black.

We're getting a little off topic for the authors issue. They bought a demo phone from a shop, which they were told at purchase no returns and they aren't happy about the image produced by the front facing camera. There's really nothing we can offer this user. They can try to take it back, but if they were told no returns, they'll likely have to live with it. Which for 50% off, isn't all that bad.

I don't see it your screenshot, but I do see in the photo that is posted. From what I can see, it is straight down from the word On in the text above the photo.

I see a green semi-circular spot in the photo the author posted.