Lots are reporting here that the proximity sensor is not working on their new iPhone 4. How about you?
https://forums.macrumors.com/threads/947842/
https://forums.macrumors.com/threads/947842/
Something you may want to add on there, is options for Yes, it is malfunctioning and I did a restore from a backup. Or No, it is not malfunctioning and I did a restore from a backup. It seems that people who restore from a backup are having issues.
Put it this way, I used my iPhone 3G for 2 years and not once did I ever face dial, mute, FaceTime, or speaker phone anyone.
You Facetimed on your 3G ? LUCKY !!!!
Why was this resurrected?
Even with 4.1 still have problems.
it's not a black and white issue.
Mine works most of the time, but sometimes it doesn't.
Which is why I'll be exchanging mine in October and hopefully a secret new design is out.