What are the min specs a pc should have to play cod 4 online with lowest graphics?

I want to trade my old iphone for an pc but i'm not sure how good it should be and i love cod 4 so i want some advice

The best thing to do is to go at that PC and check it yourself. I'll tell you what to do:

1. Go to that PC, click (Windows Button) + R and the Run window will appear,
2. Type dxdiag and then click ENTER
3. There see at the bottom for DirectX version (it should be or more than DirectX 9.0c, careful, it needs to be with a "c" at the end. We're great here)
4. Next thing, check out for the processor. If it's Pentium 4, it needs to be 2.4 GHz or more. If it's not Pentium 4 it's ok, TRUST ME!
5. Then for the last check out for the RAM at Memory. If it's 512 mb or more it's ok and you are ready to play COD.

One advice: Please don't buy the PC if it's Graphics Card is Intel. Just trust me, i'm an engineer.

Hope i helped,
Happy Gaming.